II
The chief danger to our philosophy, apart from laziness and woolliness, is scholasticism, . . . which is treating what is vague as if it were precise. . .
-- F. P. Ramsey.
We have reached a point from which we could without delay proceed to an analysis of the historicist philosophy of Hegel, or, at any rate, to the brief comments upon the developments between Aristotle and Hegel and upon the rise of Christianity that conclude, as section III, the present chapter. As a kind of digression, however, I shall next discuss a more technical problem, Aristotle's essentialist method of Definitions.
The problem of definitions and of the 'meaning of terms' does not directly bear upon historicism. But it has been an inexhaustible source of confusion and of that particular kind of verbiage which, when combined with historicism in Hegel's mind, has bred that poisonous intellectual disease of our own time which I call oracular philosophy. And it is the most important source of Aristotle's regrettably still prevailing intellectual influence, of all that verbal and empty scholasticism that haunts not only the Middle Ages, but our own contemporary philosophy; for even a philosophy as recent as that of L. Wittgenstein [26] suffers, as we shall see, from this influence. The development of thought since Aristotle could, I think, be summed up by saying that every discipline, as long as it used the Aristotelian method of definition, has remained arrested in a state of empty verbiage and barren scholasticism, and that the degree to which the various sciences have been able to make any progress depended on the degree to which they have been able to get rid of this essentialist method. (This is why so much of our 'social science' still belongs to the Middle Ages.) The discussion of this method will have to be a little abstract, owing to the fact that the problem has been so thoroughly muddled by Plato and Aristotle, whose influence has given rise to such deep-rooted prejudices that the prospect of dispelling them does not seem very bright. In spite of all that, it is perhaps not without interest to analyse the source of so much confusion and verbiage.
Aristotle followed Plato in distinguishing between knowledge and opinion [27]. Knowledge, or science, according to Aristotle, may be of two kinds — either demonstrative or intuitive. Demonstrative knowledge is also a knowledge of 'causes'. It consists of statements that can be demonstrated — the conclusions — together with their syllogistic demonstrations (which exhibit the 'causes' in their 'middle terms'). Intuitive knowledge consists in grasping the 'indivisible form' or essence or essential nature of a thing (if it is 'immediate', i.e. if its 'cause' is identical with its essential nature); it is the originative source of all science since it grasps the original basic premises of all demonstrations.
Undoubtedly, Aristotle was right when he insisted that we must not attempt to prove or demonstrate all our knowledge. Every proof must proceed from premises; the proof as such, that is to say, the derivation from the premises, can therefore never finally settle the truth of any conclusion, but only show that the conclusion must be true provided the premises are true. If we were to demand that the premises should be proved in their turn, the question of truth would only be shifted back by another step to a new set of premises, and so on, to infinity. It was in order to avoid such an infinite regress (as the logicians say) that Aristotle taught that we must assume that there are premises which are indubitably true, and which do not need any proof; and these he called 'basic premises'. If we take for granted the methods by which we derive conclusions from these basic premises, then we could say that, according to Aristotle, the whole of scientific knowledge is contained in the basic premises, and that it would all be ours if only we could obtain an encyclopaedic list of the basic premises. But how to obtain these basic premises? Like Plato, Aristotle believed that we obtain all knowledge ultimately by an intuitive grasp of the essences of things. 'We can know a thing only by knowing its essence', Aristotle writes [28], and 'to know a thing is to know its essence'. A 'basic premise' is, according to him, nothing but a statement describing the essence of a thing. But such a statement is just what he calls [29] a definition. Thus all 'basic premises of proofs' are definitions.
What does a definition look like? An example of a definition would be: 'A puppy is a young dog.' The subject of such a definition-sentence, the term 'puppy', is called the term to be defined (or defined term); the words 'young dog' are called the defining formula. As a rule, the defining formula is longer and more complicated than the defined term, and sometimes very much so. Aristotle considers [30] the term to be defined as a name of the essence of a thing, and the defining formula as the description of that essence. And he insists that the defining formula must give an exhaustive description of the essence or the essential properties of the thing in question; thus a statement like 'A puppy has four legs', although true, is not a satisfactory definition, since it does not exhaust what may be called the essence of puppiness, but holds true of a horse also; and similarly the statement 'A puppy is brown', although it may be true of some, is not true of all puppies; and it describes what is not an essential but merely an accidental property of the defined term.
But the most difficult question is how we can get hold of definitions or basic premises, and make sure that they are correct — that we have not erred, not grasped the wrong essence. Although Aristotle is not very clear on this point [31], there can be little doubt that, in the main, he again follows Plato. Plato taught [32] that we can grasp the Ideas with the help of some kind of unerring intellectual intuition; that is to say, we visualize or look at them with our 'mental eye', a process which he conceived as analogous to seeing, but dependent purely upon our intellect, and excluding any element that depends upon our senses. Aristotle's view is less radical and less inspired than Plato's, but in the end it amounts to the same [33]. For although he teaches that we arrive at the definition only after we have made many observations, he admits that sense-experience does not in itself grasp the universal essence, and that it cannot, therefore, fully determine a definition. Eventually he simply postulates that we possess an intellectual intuition, a mental or intellectual faculty which enables us unerringly to grasp the essences of things, and to know them. And he further assumes that if we know an essence intuitively, we must be capable of describing it and therefore of defining it. (His arguments in the Posterior Analytic in favour of this theory are surprisingly weak. They consist merely in pointing out that our knowledge of the basic premises cannot be demonstrative, since this would lead to an infinite regress, and that the basic premises must be at least as true and as certain as the conclusions based upon them. 'It follows from this', he writes, 'that there cannot be demonstrative knowledge of the primary premises; and since nothing but intellectual intuition can be more true than demonstrative knowledge, it follows that it must be intellectual intuition that grasps the basic premises.' In the De Anima, and in the theological part of the Metaphysics, we find more of an argument; for here we have a theory of intellectual intuition — that it comes into contact with its object, the essence, and that it even becomes one with its object. 'Actual knowledge is identical with its object.')
Summing up this brief analysis, we can give, I believe, a fair description of the Aristotelian ideal of perfect and complete knowledge if we say that he saw the ultimate aim of all inquiry in the compilation of an encyclopaedia containing the intuitive definitions of all essences, that is to say, their names together with their defining formulae; and that he considered the progress of knowledge as consisting in the gradual accumulation of such an encyclopaedia, in expanding it as well as in filling up the gaps in it and, of course, in the syllogistic derivation from it of 'the whole body of facts' which constitute demonstrative knowledge.
Now there can be little doubt that all these essentialist views stand in the strongest possible contrast to the methods of modern science. (I have the empirical sciences in mind, not perhaps pure mathematics.) First, although in science we do our best to find the truth, we are conscious of the fact that we can never be sure whether we have got it. We have learned in the past, from many disappointments, that we must not expect finality. And we have learned not to be disappointed any longer if our scientific theories are overthrown; for we can, in most cases, determine with great confidence which of any two theories is the better one. We can therefore know that we are making progress; and it is this knowledge that to most of us atones for the loss of the illusion of finality and certainty. In other words, we know that our scientific theories must always remain hypotheses, but that, in many important cases, we can find out whether or not a new hypothesis is superior to an old one. For if they are different, then they will lead to different predictions, which can often be tested experimentally; and on the basis of such a crucial experiment, we can sometimes find out that the new theory leads to satisfactory results where the old one breaks down. Thus we can say that in our search for truth, we have replaced scientific certainty by scientific progress. And this view of scientific method is corroborated by the development of science. For science does not develop by a gradual encyclopaedic accumulation of essential information, as Aristotle thought, but by a much more revolutionary method; it progresses by bold ideas, by the advancement of new and very strange theories (such as the theory that the earth is not flat, or that 'metrical space' is not flat), and by the overthrow of the old ones.
But this view of scientific method means [34] that in science there is no 'knowledge', in the sense in which Plato and Aristotle understood the word, in the sense which implies finality; in science, we never have sufficient reason for the belief that we have attained the truth. What we usually call 'scientific knowledge' is, as a rule, not knowledge in this sense, but rather information regarding the various competing hypotheses and the way in which they have stood up to various tests; it is, using the language of Plato and Aristotle, information concerning the latest, and the best tested, scientific 'opinion'. This view means, furthermore, that we have no proofs in science (excepting, of course, pure mathematics and logic). In the empirical sciences, which alone can furnish us with information about the world we live in, proofs do not occur, if we mean by 'proof' an argument which establishes once and for ever the truth of a theory. (What may occur, however, are refutations of scientific theories.) On the other hand, pure mathematics and logic, which permit of proofs, give us no information about the world, but only develop the means of describing it. Thus we could say (as I have pointed out elsewhere [35]): 'In so far as scientific statements refer to the world of experience, they must be refutable; and, in so far as they are irrefutable, they do not refer to the world of experience.' But although proof does not play any part in the empirical sciences, argument still does [36]; indeed, its part is at least as important as that played by observation and experiment.
The role of definitions in science, especially, is also very different from what Aristotle had in mind. Aristotle taught that in a definition we have first pointed to the essence — perhaps by naming it — and that we then describe it with the help of the defining formula; just as in an ordinary sentence like 'This puppy is brown', we first point to a certain thing by saying 'this puppy', and then describe it as 'brown'. And he taught that by thus describing the essence to which the term points which is to be defined, we determine or explain the meaning [37] of the term also. Accordingly, the definition may at one time answer two very closely related questions. The one is 'What is it?', for example, 'What is a puppy?'; it asks what the essence is which is denoted by the defined term. The other is 'What does it mean?', for example, 'What does "puppy" mean?'; it asks for the meaning of a term (namely, of the term that denotes the essence). In the present context, it is not necessary to distinguish between these two questions; rather, it is important to see what they have in common; and I wish, especially, to draw attention to the fact that both questions are raised by the term that stands, in the definition, on the left side and answered by the defining formula which stands on the right side. This fact characterizes the essentialist view, from which the scientific method of definition radically differs.
While we may say that the essentialist interpretation reads a definition 'normally', that is to say, from the left to the right, we can say that a definition, as it is normally used in modern science, must be read back to front, or from the right to the left', for it starts with the defining formula, and asks for a short label to it. Thus the scientific view of the definition 'A puppy is a young dog' would be that it is an answer to the question 'What shall we call a young dog?' rather than an answer to the question 'What is a puppy?'. (Questions like 'What is life?' or 'What is gravity?' do not play any role in science.) The scientific use of definitions, characterized by the approach 'from the right to the left', may be called its nominalist interpretation, as opposed to its Aristotelian or essentialist interpretation [38]. In modern science, only [39] nominalist definitions occur, that is to say, shorthand symbols or labels are introduced in order to cut a long story short. And we can at once see from this that definitions do not play any very important part in science. For shorthand symbols can always, of course, be replaced by the longer expressions, the defining formula, for which they stand. In some cases this would make our scientific language very cumbersome; we should waste time and paper. But we should never lose the slightest piece of factual information. Our 'scientific knowledge', in the sense in which this term may be properly used, remains entirely unaffected if we eliminate all definitions; the only effect is upon our language, which would lose, not precision [40], but merely brevity. (This must not be taken to mean that in science there cannot be an urgent practical need for introducing definitions, for brevity's sake.) There could hardly be a greater contrast than that between this view of the part played by definitions, and Aristotle's view. For Aristotle's essentialist definitions are the principles from which all our knowledge is derived; they thus contain all our knowledge; and they serve to substitute a long formula for a short one. As opposed to this, the scientific or nominalist definitions do not contain any knowledge whatever, not even any 'opinion'; they do nothing but introduce new arbitrary shorthand labels; they cut a long story short.
In practice, these labels are of the greatest usefulness. In order to see this, we only need to consider the extreme difficulties that would arise if a bacteriologist, whenever he spoke of a certain strain of bacteria, had to repeat its whole description (including the methods of dyeing, etc., by which it is distinguished from a number of similar species). And we may also understand, by a similar consideration, why it has so often been forgotten, even by scientists, that scientific definitions must be read 'from the right to the left', as explained above. For most people, when first studying a science, say bacteriology, must try to find out the meanings of all these new technical terms with which they are faced. In this way, they really learn the definition 'from the left to the right', substituting, as if it were an essentialist definition, a very long story for a very short one. But this is merely a psychological accident, and a teacher or writer of a textbook may indeed proceed quite differently; that is to say, he may introduce a technical term only after the need for it has arisen [41].
So far I have tried to show that the scientific or nominalist use of definitions is entirely different from Aristotle's essentialist method of definitions. But it can also be shown that the essentialist view of definitions is simply untenable in itself. In order not to prolong this digression unduly [42], I shall criticize two only of the essentialist doctrines; two doctrines which are of significance because some influential modern schools are still based upon them. One is the esoteric doctrine of intellectual intuition, and the other the very popular doctrine that 'we must define our terms', if we wish to be precise. Aristotle held with Plato that we possess a faculty, intellectual intuition, by which we can visualize essences and find out which definition is the correct one, and many modern essentialists have repeated this doctrine. Other philosophers, following Kant, maintain that we do not possess anything of the sort. My opinion is that we can readily admit that we possess something which may be described as 'intellectual intuition'; or more precisely, that certain of our intellectual experiences may be thus described. Everybody who 'understands' an idea, or a point of view, or an arithmetical method, for instance, multiplication, in the sense that he has 'got the feel of it', might be said to understand that thing intuitively; and there are countless intellectual experiences of that kind. But I would insist, on the other hand, that these experiences, important as they may be for our scientific endeavours, can never serve to establish the truth of any idea or theory, however strongly somebody may feel, intuitively, that it must be true, or that it is 'self-evident' [43]. Such intuitions cannot even serve as an argument, although they may encourage us to look for arguments. For somebody else may have just as strong an intuition that the same theory is false. The way of science is paved with discarded theories which were once declared self-evident; Francis Bacon, for example, sneered at those who denied the self-evident truth that the sun and the stars rotated round the earth, which was obviously at rest. Intuition undoubtedly plays a great part in the life of a scientist, just as it does in the life of a poet. It leads him to his discoveries. But it may also lead him to his failures. And it always remains his private affair, as it were. Science does not ask how he has got his ideas, it is only interested in arguments that can be tested by everybody. The great mathematician. Gauss, described this situation very neatly once when he exclaimed: 'I have got my result; but I do not know yet how to get it.' All this applies, of course, to Aristotle's doctrine of intellectual intuition of so-called essences [44], which was propagated by Hegel, and in our own time by E. Husserl and his numerous pupils; and it indicates that the 'intellectual intuition of essences' or 'pure phenomenology', as Husserl calls it, is a method of neither science nor philosophy. (The much debated question whether it is a new invention, as the pure phenomenologists think, or perhaps a version of Cartesianism or Hegelianism, can be easily decided; it is a version of Aristotelianism.)
The second doctrine to be criticized has even more important connections with modern views; and it bears especially upon the problem of verbalism. Since Aristotle, it has become widely known that one cannot prove all statements, and that an attempt to do so would break down because it would lead only to an infinite regression of proofs. But neither he [45] nor, apparently, a great many modern writers seem to realize that the analogous attempt to define the meaning of all our terms must, in the same way, lead to an infinite regression of definitions. The following passage from Grossman's Plato To-Day is characteristic of a view which by implication is held by many contemporary philosophers of repute, for example, by Wittgenstein [46]: '... if we do not know precisely the meanings of the words we use, we cannot discuss anything profitably. Most of the futile arguments on which we all waste time are largely due to the fact that we each have our own vague meanings for the words we use and assume that our opponents are using them in the same senses. If we defined our terms to start with, we could have far more profitable discussions. Again, we have only to read the daily papers to observe that propaganda (the modern counterpart of rhetoric) depends largely for its success on confusing the meaning of the terms. If politicians were compelled by law to define any term they wished to use, they would lose most of their popular appeal, their speeches would be shorter, and many of their disagreements would be found to be purely verbal.' This passage is very characteristic of one of the prejudices which we owe to Aristotle, of the prejudice that language can be made more precise by the use of definitions. Let us consider whether this can really be done.
First, we can see clearly that if 'politicians' (or anybody else) 'were compelled by law to define any term they wished to use', their speeches would not be shorter, but infinitely long. For a definition cannot establish the meaning of a term any more than a logical derivation [47] can establish the truth of a statement; both can only shift this problem back. The derivation shifts the problem of truth back to the premises, the definition shifts the problem of meaning back to the defining terms (i.e., the terms that make up the defining formula). But these, for many reasons [48], are likely to be just as vague and confusing as the terms we started with; and in any case, we should have to go on to define them in turn; which leads to new terms which too must be defined. And so on, to infinity. One sees that the demand that all our terms should be defined is just as untenable as the demand that all our statements should be proved.
At first sight this criticism may seem unfair. It may be said that what people have in mind, if they demand definitions, is the elimination of the ambiguities so often connected with words such as [49] 'democracy', 'liberty', 'duty', 'religion', etc.; that it is clearly impossible to define all our terms, but possible to define some of these more dangerous terms and to leave it at that; and that the defining terms have just to be accepted, i.e., that we must stop after a step or two in order to avoid an infinite regression. This defence, however, is untenable. Admittedly, the terms mentioned are much misused. But I deny that the attempt to define them can improve matters. It can only make matters worse. That by 'defining their terms' even once, and leaving the defining terms undefined, the politicians would not be able to make their speeches shorter, is clear; for any essentialist definition, i.e. one that 'defines our terms' (as opposed to the nominalist one which introduces new technical terms), means the substitution of a long story for a short one, as we have seen. Besides, the attempt to define terms would only increase the vagueness and confusion. For since we cannot demand that all the defining terms should be defined in their turn, a clever politician or philosopher could easily satisfy the demand for definitions. If asked what he means by 'democracy', for example, he could say 'the rule of the general will' or 'the rule of the spirit of the people'; and since he has now given a definition, and so satisfied the highest standards of precision, nobody will dare to criticize him any longer. And, indeed, how could he be criticized, since the demand that 'rule' or 'people' or 'will' or 'spirit' should be defined in their turn, puts us well on the way to an infinite regression so that everybody would hesitate to raise it? But should it be raised in spite of all that, then it can be equally easily satisfied. On the other hand, a quarrel about the question whether the definition was correct, or true, can only lead to an empty controversy about words.
Thus the essentialist view of definition breaks down, even if it does not, with Aristotle, attempt to establish the 'principles' of our knowledge, but only makes the apparently more modest demand that we should 'define the meaning of our terms'.
But undoubtedly, the demand that we speak clearly and without ambiguity is very important, and must be satisfied. Can the nominalist view satisfy it? And can nominalism escape the infinite regression?
It can. For the nominalist position there is no difficulty which corresponds to the infinite regression. As we have seen, science does not use definitions in order to determine the meaning of its terms, but only in order to introduce handy shorthand labels. And it does not depend on definitions; all definitions can be omitted without loss to the information imparted. It follows from this that in science, all the terms that are really needed must be undefined terms. How then do the sciences make sure of the meanings of their terms? Various replies to this question have been suggested [50], but I do not think that any of them are satisfactory. The situation seems to be this. Aristotelianism and related philosophies have told us for such a long time how important it is to get a precise knowledge of the meaning of our terms that we are all inclined to believe it. And we continue to cling to this creed in spite of the unquestionable fact that philosophy, which for twenty centuries has worried about the meaning of its terms, is not only full of verbalism but also appallingly vague and ambiguous, while a science like physics which worries hardly at all about terms and their meaning, but about facts instead, has achieved great precision. This, surely, should be taken as indicating that, under Aristotelian influence, the importance of the meaning of terms has been grossly exaggerated. But I think that it indicates even more. For not only does this concentration on the problem of meaning fail to establish precision; it is itself the main source of vagueness, ambiguity, and confusion.
In science, we take care that the statements we make should never depend upon the meaning of our terms. Even where the terms are defined, we never try to derive any information from the definition, or to base any argument upon it. This is why our terms make so little trouble. We do not overburden them. We try to attach to them as little weight as possible. We do not take their 'meaning' too seriously. We are always conscious that our terms are a little vague (since we have learned to use them only in practical applications) and we reach precision not by reducing their penumbra of vagueness, but rather by keeping well within it, by carefully phrasing our sentences in such a way that the possible shades of meaning of our terms do not matter. This is how we avoid quarrelling about words.
The view that the precision of science and of scientific language depends upon the precision of its terms is certainly very plausible, but it is none the less, I believe, a mere prejudice. The precision of a language depends, rather, just upon the fact that it takes care not to burden its terms with the task of being precise. A term like 'sand-dune' or 'wind' is certainly very vague. (How many inches high must a little sand-hill be in order to be called 'sand-dune'? How quickly must the air move in order to be called 'wind'?) However, for many of the geologist's purposes, these terms are quite sufficiently precise; and for other purposes, when a higher degree of differentiation is needed, he can always say 'dunes between 4 and 30 feet high' or 'wind of a velocity of between 20 and 40 miles an hour'. And the position in the more exact sciences is analogous. In physical measurements, for instance, we always take care to consider the range within which there may be an error; and precision does not consist in trying to reduce this range to nothing, or in pretending that there is no such range, but rather in its explicit recognition.
Even where a term has made trouble, as for instance the term 'simultaneity' in physics, it was not because its meaning was unprecise or ambiguous, but rather because of some intuitive theory which induced us to burden the term with too much meaning, or with too 'precise' a meaning, rather than with too little. What Einstein found in his analysis of simultaneity was that, when speaking of simultaneous events, physicists made a false assumption which would have been unchallengeable were there signals of infinite velocity. The fault was not that they did not mean anything, or that their meaning was ambiguous, or the term not precise enough; what Einstein found was, rather, that the elimination of a theoretical assumption, unnoticed so far because of its intuitive self-evidence, was able to remove a difficulty which had arisen in science. Accordingly, he was not really concerned with a question of the meaning of a term, but rather with the truth of a theory. It is very unlikely that it would have led to much if someone had started, apart from a definite physical problem, to improve the concept of simultaneity by analysing its 'essential meaning', or even by analysing what physicists 'really mean' when they speak of simultaneity.
I think we can learn from this example that we should not attempt to cross our bridges before we come to them. And I also think that the preoccupation with questions concerning the meaning of terms, such as their vagueness or their ambiguity, can certainly not be justified by an appeal to Einstein's example. Such a preoccupation rests, rather, on the assumption that much depends upon the meaning of our terms, and that we operate with this meaning; and therefore it must lead to verbalism and scholasticism. From this point of view, we may criticize a doctrine like that of Wittgenstein [51], who holds that while science investigates matters of fact, it is the business of philosophy to clarify the meaning of terms, thereby purging our language, and eliminating linguistic puzzles. It is characteristic of the views of this school that they do not lead to any chain of argument that could be rationally criticized; the school therefore addresses its subtle analyses [52] exclusively to the small esoteric circle of the initiated. This seems to suggest that any preoccupation with meaning tends to lead to that result which is so typical of Aristotelianism: scholasticism and mysticism.
Let us consider briefly how these two typical results of Aristotelianism have arisen. Aristotle insisted that demonstration or proof, and definition, are the two fundamental methods of obtaining knowledge. Considering the doctrine of proof first, it cannot be denied that it has led to countless attempts to prove more than can be proved; medieval philosophy is full of this scholasticism and the same tendency can be observed, on the Continent, down to Kant. It was Kant's criticism of all attempts to prove the existence of God which led to the romantic reaction of Fichte, Schelling, and Hegel. The new tendency is to discard proofs, and with them, any kind of rational argument. With the romantics, a new kind of dogmatism becomes fashionable, in philosophy as well as in the social sciences. It confronts us with its dictum. And we can take it or leave it. This romantic period of an oracular philosophy, called by Schopenhauer the 'age of dishonesty', is described by him as follows [53]: 'The character of honesty, that spirit of undertaking an inquiry together with the reader, which permeates the works of all previous philosophers, disappears here completely. Every page witnesses that these so-called philosophers do not attempt to teach, but to bewitch the reader.'
Mysterious as is the effect of magnetization, it is nevertheless clear that it consists primarily in the suspension of animal functions in that the vital force is diverted from the brain, that mere pensioner or parasite of the organism, or rather is driven back to organic life as its primitive function; for now its undivided presence and effectiveness as vis medicatrix are required there. But within the nervous system and thus the exclusive seat of all sensuous life, organic life is represented and replaced by the guide and governor of its functions, the sympathetic nerve and its ganglia. Thus the event can also be regarded as a repression of the vital force from the brain to the sympathetic nerve; but generally the two can also be looked upon as mutually opposite poles; and so the brain, with the organs of movement attached thereto, can be regarded as the positive and conscious pole, and the sympathetic nerve, with its ganglionic networks, as the negative and unconscious. Now in this sense, the following hypothesis could be given concerning the course of events in magnetization. It is an action of the magnetizer's brain-pole (and hence of his external nerve-pole) on the homonymous pole of the patient; and so it acts on the latter by repulsion in accordance with the universal law of polarity, whereby the nervous force is driven back to the other pole of the nervous system, to the inner, the gastric ganglionic system. Therefore men in whom the brain-pole prevails are best fitted for magnetizing, whereas women in whom the ganglionic system predominates are most susceptible to being magnetized and to the consequences thereof. If it were possible for the female ganglionic system to be capable of acting in just the same way on the male and so also by repulsion, then through the reverse process an abnormally enhanced cerebral life, a temporary genius, would inevitably result. This is not feasible because the ganglionic system is not capable of acting outwards. On the other hand, the magnetizing bucket might well be regarded as an attracting magnetization through the action on each other of heteronymous or unlike poles, so that the sympathetic nerves of all the patients sitting round the bucket which are connected thereto by iron rods and woollen cords running to the pit of the stomach and which operate with united force enhanced by the inorganic mass of the bucket, would draw to themselves the individual brainpole of each of the patients, and so lower the potential of animal life, causing it to be submerged in the magnetic sleep of all. This could be compared to the lotus that is submerged every evening in the flood. In keeping also with this is the fact that, when the ladder of the bucket had once been laid on the head instead of on the pit of the stomach, violent congestion and headache were the result (Kieser, Tellurismus, 1st edn., Vol. i, p. 439). In the sidereal bucket, the bare unmagnetized metals exert the same force. This appears to be connected with the fact that metal is the simplest and most original thing, the lowest grade of the will's objectification, and consequently the very opposite to the brain as being the highest development of that objectification; and hence that it is the thing remotest from the brain. Moreover, metal offers the maximum mass in the minimum space. Accordingly, it recalls the will to its original nature and is related to the ganglionic system as, conversely, light is to the brain, and so somnambulists shun the contact of metals with the organs of the conscious pole. The sensitivity to metals and water of those so disposed can also be explained in this way. With the ordinary magnetized bucket, what operate are the ganglionic systems, connected thereto, of all the patients who are assembled round it and with their united force draw down the brain-poles. This also helps to explain the contagion of somnambulism generally as also the communication, akin to it, of the present activity of second sight through the mutual contact of those endowed with it, and the communication and consequently the communion of visions generally.
But if we wished to venture on an even bolder application of the above hypothesis which concerns the course of events in magnetization and starts from the laws of polarity, then it might be deduced from this, although only schematically, how, in the higher degrees of somnambulism, the relation can go to such lengths that the somnambulist shares all the ideas, knowledge, manners of speaking, and even the sensations of the magnetizer. She is thus present in his brain, whereas his will, on the other hand, has a direct influence on her and he is so completely her master that he can fix her by his spell. Thus with the galvanic apparatus, now most commonly used, where the two metals are immersed in two kinds of acids that are separated by earthenware partitions, the positive current flows through these liquids from the zinc to the copper, and then externally in the electrode from the copper back to the zinc. Hence by analogy, the positive current of vital force, as the will of the magnetizer, would flow from his brain to that of the somnambulist, controlling her and driving back to the sympathetic nerve and thus to the epigastric region, to her negative pole, her vital force that produces consciousness in the brain. But then the same current would again flow from here back into the magnetizer, to his positive pole, his brain, where it meets his ideas and sensations; and then in this way does the somnambulist share them. These, of course, are very bold assumptions, but with the extremely obscure matters that here constitute our problem every hypothesis is admissible which leads to some understanding, although such may be only schematic or analogical.
-- Parerga and Paralipomena: Short Philosophical Essays, by Arthur Schopenhauer
A similar result was produced by Aristotle's doctrine of definition. First it led to a good deal of hairsplitting. But later, philosophers began to feel that one cannot argue about definitions. In this way, essentialism not only encouraged verbalism, but it also led to the disillusionment with argument, that is, with reason. Scholasticism and mysticism and despair in reason, these are the unavoidable results of the essentialism of Plato and Aristotle. And Plato's open revolt against freedom becomes, with Aristotle, a secret revolt against reason.
As we know from Aristotle himself, essentialism and the theory of definition met with strong opposition when they were first proposed, especially from Socrates' old companion Antisthenes, whose criticism seems to have been most sensible [54]. But this opposition was unfortunately defeated. The consequences of this defeat for the intellectual development of mankind can hardly be overrated. Some of them will be discussed in the next chapter. With this I conclude my digression, the criticism of the Platonic-Aristotelian theory of definition.
III
It will hardly be necessary again to stress the fact that my treatment of Aristotle is most sketchy — much more so than my treatment of Plato. The main purpose of what has been said about both of them is to show the role they have played in the rise of historicism and in the fight against the open society, and to show their influence on problems of our own time — on the rise of the oracular philosophy of Hegel, the father of modern historicism and totalitarianism. The developments between Aristotle and Hegel cannot be treated here at all. In order to do anything like justice to them, at least another volume would be needed. In the remaining few pages of this chapter I shall, however, attempt to indicate how this period might be interpreted in terms of the conflict between the open and the closed society.
The conflict between the Platonic-Aristotelian speculation and the spirit of the Great Generation, of Pericles, of Socrates, and of Democritus, can be traced throughout the ages. This spirit was preserved, more or less purely, in the movement of the Cynics who, like the early Christians, preached the brotherhood of man, which they connected with a monotheistic belief in the fatherhood of God. Alexander's empire as well as that of Augustus was influenced by these ideas which had first taken shape in the imperialist Athens of Pericles, and which had always been stimulated by the contact between West and East. It is very likely that these ideas, and perhaps the Cynic movement itself, influenced the rise of Christianity also.
In its beginning, Christianity, like the Cynic movement, was opposed to the highbrow Platonizing Idealism and intellectualism of the 'scribes', the learned men. ('Thou hast hid these things from the wise and prudent and hast revealed them unto the babes.') I do not doubt that it was, in part, a protest against what may be described as Jewish Platonism in the wider sense [55], the abstract worship of God and His Word. And it was certainly a protest against Jewish tribalism, against its rigid and empty tribal taboos, and against its tribal exclusiveness which expressed itself, for example, in the doctrine of the chosen people, i.e. in an interpretation of the deity as a tribal god. Such an emphasis upon tribal laws and tribal unity appears to be characteristic not so much of a primitive tribal society as of a desperate attempt to restore and arrest the old forms of tribal life; and in the case of Jewry, it seems to have originated as a reaction to the impact of the Babylonian conquest on Jewish tribal life. But side by side with this movement towards greater rigidity we find another movement which apparently originated at the same time, and which produced humanitarian ideas that resembled the response of the Great Generation to the dissolution of Greek tribalism. This process, it appears, repeated itself when Jewish independence was ultimately destroyed by Rome. It led to a new and deeper schism between these two possible solutions, the return to the tribe, as represented by orthodox Jewry, and the humanitarianism of the new sect of Christians, which embraced barbarians (or gentiles) as well as slaves. We can see from the Acts [56] how urgent these problems were, the social problem as well as the national problem. And we can see this from the development of Jewry as well; for its conservative part reacted to the same challenge by another movement towards arresting and petrifying their tribal form of life, and by clinging to their 'laws' with a tenacity which would have won the approval of Plato. It can hardly be doubted that this development was, like that of Plato's ideas, inspired by a strong antagonism to the new creed of the open society; in this case, of Christianity.
But the parallelism between the creed of the Great Generation, especially of Socrates, and that of early Christianity goes deeper. There is little doubt that the strength of the early Christians lay in their moral courage. It lay in the fact that they refused to accept Rome's claim 'that it was entitled to compel its subjects to act against their conscience' [57]. The Christian martyrs who rejected the claims of might to set the standards of right suffered for the same cause for which Socrates had died.
It is clear that these matters changed very considerably when the Christian faith itself became powerful in the Roman empire. The question arises whether this official recognition of the Christian Church (and its later organization after the model of Julian the Apostate's Neo-Platonic Anti-Church [58] ) was not an ingenious political move on the part of the ruling powers, designed to break the tremendous moral influence of an equalitarian religion — a religion which they had in vain attempted to combat by force as well as by accusations of atheism and impiety. In other words, the question arises whether (especially after Julian) Rome did not find it necessary to apply Pareto's advice, 'to take advantage of sentiments, not wasting one's energies in futile efforts to destroy them'. This question is hard to answer; but it certainly cannot be dismissed by appealing (as Toynbee does [59]) to our 'historical sense that warns us against attributing', to the period of Constantine and his followers, '... motives that are anachronistically cynical', that is to say, motives that are more in keeping with our own 'modern Western attitude to life'. For we have seen that such motives are openly and 'cynically', or more precisely, shamelessly, expressed as early as in the fifth century B.C., by Critias, the leader of the Thirty Tyrants; and similar statements can be found frequently during the history of Greek philosophy [60]. However this may be, it can hardly be doubted that with Justinian's persecution of non-Christians, heretics, and philosophers (A.D. 529), the dark ages began. The Church followed in the wake of Platonic-Aristotelian totalitarianism, a development that culminated in the Inquisition. The theory of the Inquisition, more especially, can be described as purely Platonic. It is set out in the last three books of the Laws, where Plato shows that it is the duty of the shepherd rulers to protect their sheep at all costs by preserving the rigidity of the laws and especially of religious practice and theory, even if they have to kill the wolf, who may admittedly be an honest and honourable man whose diseased conscience unfortunately does not permit him to bow to the threats of the mighty.
It is one of the characteristic reactions to the strain of civilization in our own time that the allegedly 'Christian' authoritarianism of the Middle Ages has, in certain intellectualist circles, become one of the latest fashions of the day [61]. This, no doubt, is due not only to the idealization of an indeed more 'organic' and 'integrated' past, but also to an understandable revulsion against modern agnosticism which has increased this strain beyond measure. Men believed God to rule the world. This belief limited their responsibility. The new belief that they had to rule it themselves created for many a well-nigh intolerable burden of responsibility. All this has to be admitted. But I do not doubt that the Middle Ages were, even from the point of view of Christianity, not better ruled than our Western democracies. For we can read in the Gospels that the founder of Christianity was questioned by a certain 'doctor of the law' about a criterion by which to distinguish between a true and a false interpretation of His words. To this He replied by telling the parable of the priest and the Levite who both, seeing a wounded man in great distress, 'passed by on the other side', while the Samaritan bound up his wounds, and looked after his material needs. This parable, I think, should be remembered by those 'Christians' who long not only for a time when the Church suppressed freedom and conscience, but also for a time in which, under the eye and with the authority of the Church, untold oppression drove the people to despair. As a moving comment upon the suffering of the people in those days and, at the same time, upon the 'Christianity' of the now so fashionable romantic medievalism which wants to bring these days back, a passage may be quoted here from H. Zinsser's book. Rats, Lice, and History, [62] in which he speaks about epidemics of dancing mania in the Middle Ages, known as 'St. John's dance', 'St. Vitus' dance', etc. (I do not wish to invoke Zinsser as an authority on the Middle Ages — there is no need to do so since the facts at issue are hardly controversial. But his comments have the rare and peculiar touch of the practical Samaritan — of a great and humane physician.) 'These strange seizures, though not unheard of in earlier times, became common during and immediately after the dreadful miseries of the Black Death. For the most part, the dancing manias present none of the characteristics which we associate with epidemic infectious diseases of the nervous system. They seem, rather, like mass hysterias, brought on by terror and despair, in populations oppressed, famished, and wretched to a degree almost unimaginable to-day. To the miseries of constant war, political and social disintegration, there was added the dreadful affliction of inescapable, mysterious, and deadly disease. Mankind stood helpless as though trapped in a world of terror and peril against which there was no defence. God and the devil were living conceptions to the men of those days who cowered under the afflictions which they believed imposed by supernatural forces. For those who broke down under the strain there was no road of escape except to the inward refuge of mental derangement which, under the circumstances of the times, took the direction of religious fanaticism.' Zinsser then goes on to draw some parallels between these events and certain reactions of our time in which, he says, 'economic and political hysterias are substituted for the religious ones of the earlier times'; and after this, he sums up his characterization of the people who lived in those days of authoritarianism as 'a terror-stricken and wretched population, which had broken down under the stress of almost incredible hardship and danger'. Is it necessary to ask which attitude is more Christian, one that longs to return to the 'unbroken harmony and unity' of the Middle Ages, or one that wishes to use reason in order to free mankind from pestilence and oppression?
But some part at least of the authoritarian Church of the Middle Ages succeeded in branding such practical humanitarianism as 'worldly', as characteristic of 'Epicureanism', and of men who desire only to 'fill their bellies like the beasts'. The terms 'Epicureanism', 'materialism', and 'empiricism', that is to say, the philosophy of Democritus, one of the greatest of the Great Generation, became in this way the synonyms of wickedness, and the tribal Idealism of Plato and Aristotle was exalted as a kind of Christianity before Christ. Indeed, this is the source of the immense authority of Plato and Aristotle, even in our own day, that their philosophy was adopted by medieval authoritarianism. But it must not be forgotten that, outside the totalitarian camp, their fame has outlived their practical influence upon our lives. And although the name of Democritus is seldom remembered, his science as well as his morals still live with us.