As Plato made a local habitation for himself and his doctrine in the Academia, and Aristotle in the Lyceum, so Zeno, the founder of the third great [pg 424] philosophic school, took up his abode in the Portico at Athens, a court surrounded with pillars, and adorned with the paintings of Polygnotus. Here he began to teach about 308 b.c., and here he continued teaching as some say for fifty-eight years. It is said that the character of Socrates, as drawn by Xenophon and by Plato in his Apology, filled him with astonishment and admiration:[401] and the Stoics afterwards drew their doctrine of the wise man, which they endeavoured to image out and realise, from that living example of it,[402] an instance of the connection of doctrine with person which is full of interest and suggestion. Zeno was succeeded in his office of teaching by Cleanthes, and Cleanthes by Chrysippus and a long line of teachers, who for several hundred years continued, with variations, the same general doctrine of ethics.
Just in the same way and at the same time Zeno's great rival Epicurus fixed the seat of his school in the Garden at Athens, which thenceforth became for thirty-six years the central point of the teacher's activity. About him gathered a circle of friends whom similarity of principles and the enjoyment of cultivated intercourse bound together with unusual intimacy. It speaks for the special character of his philosophy that from the beginning women and even hetæræ formed a part of this society. But he succeeded during this long period [pg 425] of teaching in impressing upon his school so strong a character that it is recognised without essential change during hundreds of years.[403]
We should do injustice to the character and the work of Plato, Aristotle, Zeno, and Epicurus, the founders of the four great schools of Greek philosophy, if we did not take into account what was in their day no doubt of greater influence than their writings, that is, their function as teachers, their oral teaching itself, and those fundamental principles of philosophic education which lay at the bottom of it. Plato has left us very little of doctrine put out in his own name. He is not a speaker in his dialogues. He puts what he would say in the mouth of others, especially of Socrates. He tells us that he has purposely done this in order that men might not say, here is Plato's philosophy:[404] and the reason of this was that he utterly distrusted his own or any man's power to disclose to others such a system in a set form of words. It is, then, the more remarkable [pg 426] that he has said in his own person what were his most settled convictions as to intercourse by word of mouth, and continuous written discourse, viewed as instruments for attaining and communicating truth. He expresses his absolute disbelief that men can reach true conceptions by their being set forth in the immutable form of writing. It is a far other and more difficult work which has to be accomplished. In a word, not even aptness for learning and memory will give the power to see the truth as to virtue and vice to one who is not kin to the subject; nor, again, this kinship without such aptitude and memory: but when both are joined, then out of living together, after much time,[405] by the continual friction of name, definition, acts of sight and perception, by thought and meditation, the hearing and answering the objections of others, the process of mutual cross-examination discharged without envy or jealousy, and with sincere love of the truth, a sudden flash of fire kindles in the mind, and nourishes itself, disclosing the knowledge required. Thus it is that prudence and intelligence on each subject, shining out in this beam of light, go forward as far as man may reach. The view here propounded, if reflected upon, will convey to us what the living [pg 427] work first of Pythagoras, and then of Plato, Aristotle, Zeno, Epicurus, and their successors, was. Both the conception indeed and the realisation seem to have been most complete in Pythagoras. The philosophic living together was its basis. Instruction was oral. Learning was effected by the collision of mind with mind, by objection and answer. It was the Socratic principle inherited from these schools that nothing passed muster for knowledge which did not stand the test of cross-examination:[406] but an unchangeable text was utterly unsuited, according to Plato, to debate the question under treatment in such fashion, while on the other hand the mind of the reader was passive in receiving the impression which it conveyed. On neither side therefore did the conditions of knowledge exist, but this was reached under the circumstances of personal intercourse above mentioned, and might be recalled in the written form to the minds of those who had thus first attained it.
Down to the end of Greek philosophy the same conception as to the method of teaching prevailed. [pg 428] Ammonius Sakkas, the founder of Neoplatonism, delivered his doctrine only by word of mouth, which his chief disciples, Erennius, Origines, and Plotinus, engaged not to make public.[407] It was when one of them, Erennius, had broken this promise, that another, Plotinus, after delivering lectures at Rome, wrote down his philosophy; but his scheme was to carry it out by collecting his disciples together in one city, and thus realising Plato's republic.
Chapter XIV. The Christian Church And The Greek Philosophy. Part II.
The mind of the next great teacher who arose in Greece after Plato presented an almost complete contrast to that of the master under whom he had so long studied. Aristotle's power consisted in a parallel development of two forces which do not often coexist.[408] He joined together a rare degree of consistent philosophic thinking with an equally rare degree of accurate observation. This double faculty is shown in what he effected. He made the sciences of logic, ethics, and psychology: he built up those of natural history and politics with the wealth of knowledge which his experience had accumulated.[409] Thus his analytic and synthetic genius embraced the whole range of human knowledge then existing. As Plato threw his vivid fancy and imagination and his religious temper into everything which concerned the human spirit, so Aristotle fixed his gaze upon nature, which with him in all its manifestations was the ultimate fact. [pg 430] As Plato rose from the single being to his conception of the true, the good, the beautiful, of which the Idea to him was everything, so Aristotle, steadfastly discarding his master's doctrine of Ideas, took his stand on the single being, examining it with the closest observation and the subtlest thought, and the knowledge thus conveyed to him is everything. Plato's conception of God is that of the great world-former, orderer, and ruler: Aristotle's conception of God is that of a pure intelligence, without power, an eternal, ever-active, endless, incorporeal substance, who never steps out of that everlasting rest into action: who is the world's first cause, but is unconscious of it, his action upon the world being likened to the influence of the beloved object upon the lover. Plato's dualism is summed up in the expression, God and Matter; Aristotle's dualism, in God and the World. Plato represents the action of the Deity as the working-up of the original matter into the millions of forms which the world exhibits: but these millions of forms are taken by Aristotle as if they had existed for ever; the World, as it is, and the Deity, are coeternal.
Aristotle's doctrine of the human soul is that it exists only as that which animates the body, without which its being cannot be known.[410] It is the principle which forms, moves, and developes the body; the substance which only appears in [pg 431] the body formed and penetrated by it, and which works continuously in it, as the life which determines and prevails over its matter. Thus the body is of itself nothing; what it is, it is only through the soul, whose being and nature it expresses, to which it is related as the medium in which the purpose, which is the soul, realises itself. Thus the soul cannot be thought of without the body, nor the body without the soul: both come into their actual state together. In the soul Aristotle distinguishes three parts, the vegetative, the sensitive, and the thinking. This last, the peculiar property of man, is further divisible into the passive and the active, of which the former is linked to the soul as the soul is to the body, as form is to matter, multiplies itself with individuals, and is extinguished with them. But the reason, or pure intelligence, has nothing in common with matter, comes from without into man, and exists in him as a self-consisting indestructible being, without multiplying or dividing itself. Accordingly this intellect or reason suffers the soul to sink back with the body into the nothing from which both have been together produced. It alone continues to subsist as what is ever the same and unchangeable, since it is nothing but the divine intelligence in an individual existence, enlightening the darkness of the human subject in the passive part of the understanding, and so must be considered as the first mover in man of his discursive thinking [pg 432] and knowing, as well as of his willing.[411] As that which is properly human in the soul, that which has had a beginning, must also pass away, even the understanding, and only the divine reason is immortal, and as memory belongs to the sensitive soul, and individual thinking only takes place by means of the passive intellect, all consciousness must cease with death. And again, clearly as Aristotle maintains that man is the mover and master of his own actions, and has it in his power to be good or evil, and thence repudiates the assumption of Socrates and Plato that no one is willingly evil, yet he cannot find a place for real freedom of the will between the motion which arises from sensitive desire, and that which proceeds from the divine intelligence dwelling in the soul. Necessity arises on both sides, from the things which determine the passive understanding, and from the divine intelligence.[412] Thus his physical theory, as in the case of Plato noted above,[413] prevents a clear conception of the human personality. His notion of man in this point corresponds to his notion of God: he does not concern himself with questions respecting the goodness, justice, and freedom of God, inasmuch as his God is not really personal:[414] so with regard to man we find in him no elucidation as to the question of moral freedom, nor of the origin and nature of wickedness in man. [pg 433] Wickedness is with Aristotle the impotence to hold the mean between too much and too little: it presents itself therefore only in this world of contingency and change, and has no relation to God, since the first or absolute good has nothing opposed to it. He has not the sense of moral perversion with regard to evil. In accordance with which the end of all moral activity with him is happiness, which consists in the well-being arising from an energy according to nature; as virtue is the observing a proper mean between two extremes. And the highest happiness is contemplative thought, the function of the divine in man, the turning away from everything external to the inner world of the conceptions.