A critical history of Greek philosophy

by W. T. Stace

The Socratic teaching is essentially ethical in character. In this alone did Socrates bear any resemblance to the Sophists. It was the Sophists who had introduced into Greek philosophy the problem of man, and of the duties of man. And to these problems Socrates also turns his exclusive attention. He brushes aside all questions as to the origin of the world, or the nature of the ultimate reality, of which we have heard so much in the philosophies of the earlier thinkers. Socrates openly deprecated such speculations and considered all such knowledge comparatively worthless as against ethical knowledge, the knowledge of man. Mathematics, physics, and astronomy, he thought, were not valuable forms of knowledge. He said that he never went for walks outside the city, because there is nothing to be learnt from fields and trees.

Nevertheless the ethical teaching of Socrates was founded upon a theory of knowledge, which is quite simple, but extremely important. The Sophists had founded knowledge upon perception, with the result [{143}] that all objective standards of truth had been destroyed. It was the work of Socrates to found knowledge upon reason, and thereby to restore to truth its objectivity. Briefly, the theory of Socrates may be summarized by saying that he taught that all knowledge is knowledge through concepts. What is a concept? When we are directly conscious of the presence of any particular thing, a man, a tree, a house, or a star, such consciousness is called perception. When, shutting our eyes, we frame a mental picture of such an object, such consciousness is called an image or representation. Such mental images are, like perceptions, always ideas of particular individual objects. But besides these ideas of individual objects, whether through sense-perception or imagination, we have also general ideas, that is to say, not ideas of any particular thing, but ideas of whole classes of things. If I say "Socrates is mortal," I am thinking of the individual, Socrates. But if I say "Man is mortal," I am thinking, not of any particular man, but of the class of men in general. Such an idea is called a general idea, or a concept. All class-names, such as man, tree, house, river, animal, horse, being, which stand, not for one thing, but for a multitude of things, represent concepts. We form these general ideas by including in them all the qualities which the whole class of objects has in common, and excluding from them all the qualities in which they differ, that is to say, the qualities which some of the objects possess, but others do not. For example, I cannot include the quality whiteness in my general idea of horses, because, though some horses are white, others are not. But I can include the quality vertebrate because all horses agree in being vertebrate. Thus a [{144}] concept is formed by bringing together the ideas in which all the members of a class of objects agree with one another, and neglecting the ideas in which they differ.

Now reason is the faculty of concepts. This may not, at first sight, be obvious. Reason, it might be objected, is the faculty of arguing, of drawing conclusions from premises. But a little consideration will show us that, though this is so, yet all reasoning is employed upon concepts. All reasoning is either deductive or inductive. Induction consists in the formulation of general principles from particular cases. A general principle is always a statement made, not about a particular thing, but about a whole class of things, that is, about a concept. Concepts are formed inductively by comparing numerous examples of a class. Deductive reasoning is always the opposite process of applying general principles to particular cases. If we argue that Socrates must be mortal because all men are so, the question is whether Socrates is a man, that is to say, whether the concept, man, is properly applied to the particular object called Socrates. Thus inductive reasoning is concerned with the formation of concepts, deductive reasoning with the application of them.

Socrates, in placing all knowledge in concepts, was thus making reason the organ of knowledge. This was in direct opposition to the principle of the Sophists, who placed all knowledge in sense-perception. Now since reason is the universal element in man, it follows that Socrates, in identifying knowledge with concepts, was restoring the belief in an objective truth, valid for all men, and binding upon all men, and was destroying the Sophistic teaching that the truth is whatever each [{145}] individual chooses to think it is. We shall see this more clearly if we reflect that a concept is the same thing as a definition. If we wish to define any word, for example, the word man, we must include in our definition only the qualities which all men have in common. We cannot, for example, define man as a white-skinned animal, because all men are not white-skinned. Similarly we cannot include "English-speaking" in our definition, because, though some men speak English, others do not. But we might include such a quality as "two-legged," because "two-legged" is a quality common to all human beings, except mere aberrations and distortions of the normal type. Thus a definition is formed in the same way as a concept, namely, by including the common qualities of a class of objects, and excluding the qualities in which the members of the class differ. A definition, in fact, is merely the expression of a concept in words. Now by the process of fixing definitions we obtain objective standards of truth. If, for example, we fix the definition of a triangle, then we can compare any geometrical figure with it, and say whether it is a triangle or not. It is no longer open to anyone to declare that whatever he chooses to call a triangle is a triangle. Similarly, if we fix upon a definition of the word man, we can then compare any object with that definition, and say whether it is a man or not. Again, if we can decide what the proper concept of virtue is, then the question whether any particular act is virtuous can only be decided by comparing that act with the concept, and seeing if they agree. The Sophist can no longer say, "whatever seems to me right, is right for me. Whatever I choose to do is virtuous for me." His act must be judged, not by [{146}] his subjective impressions, but by the concept or definition, which is thus an objective standard of truth, independent of the individual. This, then, was the theory of knowledge propounded by Socrates. Knowledge, he said, is not the same thing as the sensations of the individual, which would mean that each individual can name as the truth whatever he pleases. Knowledge means knowledge of things as they objectively are, independently of the individual, and such knowledge is knowledge of the concepts of things. Therefore the philosophizing of Socrates consisted almost exclusively in trying to frame proper concepts. He went about enquiring, "What is virtue?" "What is prudence?" "What is temperance?"--meaning thereby "what are the true concepts or definitions of these things?" In this way he attempted to find a basis for believing in an objectively real truth and an objectively real moral law.

His method of forming concepts was by induction. He would take common examples of actions which are universally admitted to be prudent, and would attempt to find the quality which they all have in common, and by virtue of which they are all classed together, and so form the concept of prudence. Then he would bring up fresh examples, and see whether they agreed with the concept so formed. If not, the concept might have to be corrected in the light of the new examples.

But the Socratic theory of knowledge was not a theory put forward for its own sake, but for practical ends. Socrates always made theory subservient to practice. He wanted to know what the concept of virtue is, only in order to practise virtue in life. And this brings us to the central point of the ethical teaching of Socrates, [{147}] which was the identification of virtue with knowledge. Socrates believed that a man cannot act rightly, unless he first knows what is right, unless, in fact, he knows the concept of right. Moral action is thus founded upon knowledge, and must spring from it. But not only did Socrates think that if a man has not knowledge, he cannot do right. He also put forward the much more doubtful assertion that if a man possesses knowledge, he cannot do wrong. All wrong-doing arises from ignorance. If a man only knows what is right, he must and will infallibly do what is right. All men seek the good, but men differ as to what the good is. "No man," said Socrates, "intentionally does wrong." He does wrong, because he does not know the true concept of right, and being ignorant, thinks that what he is doing is good. "If a man intentionally does wrong," said Socrates again, "he is better than a man who does so unintentionally." For the former has in him the essential condition of goodness, knowledge of what goodness is, but the latter, lacking that knowledge, is hopeless.

Aristotle, in commenting upon this whole doctrine, observed that Socrates had ignored or forgotten the irrational parts of the soul. Socrates imagined that everybody's actions are governed solely by reason, and that therefore if only they reasoned aright, they must do right. He forgot that the majority of men's actions are governed by passions and emotions, "the irrational parts of the soul." Aristotle's criticism of Socrates is unanswerable. All experience shows that men do deliberately do wrong, that, knowing well what is right, they nevertheless do wrong. But it is easy to see why Socrates made this mistake; he was arguing only from [{148}] his own case. Socrates really does appear to have been above human weakness. He was not guided by passions, but by reason, and it followed as the night follows the day, that if Socrates knew what was right, he did it. He was unable to understand how men, knowing the right, could yet do the wrong. If they are vicious, he thought, it must be because they do not know what is right. The criticism of Aristotle is thus justified. Yet for all that, the theory of Socrates is not to be too quickly brushed aside. There is more truth in it than appears at first sight. We say that a man believes one thing and does another. Yet it is a matter of question what a man really believes, and what is the test of his belief. Men go to church every Sunday, and there repeat formulas and prayers, of which the main idea is that all earthly riches are worthless in comparison with spiritual treasures. Such men, if asked, might tell us that they believe this to be true. They believe that they believe it. And yet in actual life, perhaps, they seek only for earthly riches, and behave as if they thought these the supreme good. What do such men really believe? Do they believe as they speak, or as they act? Is it not at least arguable that they are really pursuing what they believe to be good, and that, if they were genuinely convinced of the superiority of spiritual treasures, they would seek them, and not material riches? This at least is what Socrates thought. All men seek the good, but the many do not know what the good is. There is certainly truth in this in many cases, though in others there can be no doubt that men do deliberately what they know to be evil.

There are two other characteristic Socratic propositions [{149}] which flow from the same general idea, that virtue is identical with knowledge. The first is, that virtue can be taught. We do not ordinarily think that virtue can be taught like arithmetic. We think that virtue depends upon a number of factors, prominent among which are the inborn disposition of a man, heredity, environment, modified to some extent by education, practice, and habit. The consequence is that a man's character does not change very much as he grows older. By constant practice, by continual self-control, a man may, to some extent, make himself better, but on the whole, what he is he remains. The leopard, we say, does not change his spots. But as, for Socrates, the sole condition of virtue is knowledge, and as knowledge is just what can be imparted by teaching, it followed that virtue must be teachable. The only difficulty is to find the teacher, to find some one who knows the concept of virtue. What the concept of virtue is--that is, thought Socrates, the precious piece of knowledge, which no philosopher has ever discovered, and which, if it were only discovered, could at once be imparted by teaching, whereupon men would at once become virtuous.

The other Socraticism is that "virtue is one." We talk of many virtues, temperance, prudence, foresight, benevolence, kindness, etc. Socrates believed that all these particular virtues flowed from the one source, knowledge. Therefore knowledge itself, that is to say, wisdom, is the sole virtue, and this includes all the others.

This completes the exposition of the positive teaching of Socrates. It only remains for us to consider what position Socrates holds in the history of thought. There are two sides of the Socratic teaching. In the first [{150}] place, there is the doctrine of knowledge, that all knowledge is through concepts. This is the scientific side of the philosophy of Socrates. Secondly, there is his ethical teaching. Now the essential and important side of Socrates is undoubtedly the scientific theory of concepts. It is this which gives him his position in the history of philosophy. His ethical ideas, suggestive as they were, were yet all tainted with the fallacy that men are governed only by reason. Hence they have exercised no great influence on the history of thought. But the theory of concepts worked a revolution in philosophy. Upon a development of it is founded the whole of Plato's philosophy, and, through Plato, the philosophy of Aristotle, and, indeed, all subsequent idealism. The immediate effect of this theory, however, was the destruction of the teaching of the Sophists. The Sophists taught the doctrine that truth is sense-perception, and as the perceptions of different individuals differ in regard to the same object, it followed that truth became a matter of taste with the individual. This undermined all belief in truth as an objective reality, and, by similar reasoning, faith in the objectivity of the moral law was also destroyed. The essential position of Socrates is that of a restorer of faith. His greatness lay in the fact that he saw that the only way to combat the disastrous results of the Sophistic teaching was to refute the fundamental assumption from which all that teaching flowed, the assumption, namely, that knowledge is perception. Against this, therefore, Socrates opposed the doctrine that knowledge is through concepts. To base knowledge upon concepts is to base it upon the universality of reason, and therefore to restore it from the [{151}] position of a subjective seeming to that of an objective reality.