Thus we get a system of a certain grand consistency and an impressively constant re-application of certain fundamental ideas to every kind of subject-matter. But the Platonic Dualism, though everywhere vigorously attacked, is yet nowhere fully overcome.
For in Metaphysics, Plato’s “One alongside of the Many” becomes with Aristotle the “One throughout the Many”: to the mind of the latter, the Separate General, Pure Form as existing without Matter, is a mere abstraction; Matter without Form is a simple potentiality; Matter and Form together, and they only, constitute the Particular, and (in and by it) all actual and full Reality. And only Reality, in the highest and primary sense, can, according to him, form the highest and primary object of Knowledge. Yet knowledge never refers to the Particular, but always to the General; and, in the Particular, only to the General manifested in it. And this is the case, not because, though the Particular is the fuller Reality, we can more easily reach the General within it; but, on the contrary, because, though we can more easily reach the Particular, the General alone is abiding and fully true and really knowable.
Again, for Aristotle the Particular, which alone really exists, is constituted a particular and really existent Being, in virtue of its participation in Matter; but it is constituted as abiding, true, and knowable, in virtue of its Form. The cause of its Reality is thus different from that of its Truth; the addition of the simple Potentiality of Matter has alone given Reality to the pure Actuality of Form.
Finally, for Aristotle all Movement, as comprehensive of every kind of change, being defined as the transition from Potentiality to Reality, as the determination of Matter by Form, can be called forth, in the last resort, only by a pure Form which, though the cause of all Motion, is itself unmoved, is pure Thought and Speculation, a thinking of thinking,—God eternally thinking God and Himself alone. Yet this God is, if thus safely distinguished from the world, yet hardly more Personal than Spirit was in Anaxagoras, or the Idea of Good was in Plato. For not only does Aristotle refuse Him a body and all psychic life, but with them he eliminates all Doing and all Producing, all Emotion and all Willing, indeed all Thinking except that of His own lonely Self-Contemplation. And yet the activity of the will is as essential to Personality as that of thinking; and thinking again we can conceive as personal only if conditioned by a diversity of objects and a variety of mental states. And this God’s relations with the world are strangely few and still curiously materialistic. For He but sets the world in motion, and has no special care for it or detailed rule over it; and since, of the three or four kinds of motion, spacial motion is declared to be the primary one, and its most perfect form to be the circular, and since a circle moves quickest at its circumference, He is conceived as imparting to the world a spacial and a circular movement, and this, apparently, from a point in space, since He does so from outside. His transcendence is, so far, but a spacial one.
In Physics, Aristotle still constantly describes Nature as an harmonious, reasonable Being, an all-effecting force. There is here a mythical strain at work, and yet nowhere is a subject clearly defined to which these various qualities could be attributed.
In Anthropology again, the active soul, the rational and free-willing, the immortal principle, is that which specially distinguishes and constitutes Humanity, and which indeed is the Form of the lower soul-powers and of the body as well. Yet it is these lower soul-powers, it is the passive, the vegetative and sensitive, the mortal soul-powers which, in and with the body, constitute this particular man, and only particular men are really existent. Where and how then is this living man’s Personality, his indelible consciousness of the unity of his nature, to arise and to be found in all this medley?
And finally, in Ethics, Aristotle maintains and develops, it is true, the great Socratic tradition of conceiving all virtue as active, and demands with Plato that the whole man should, as much as may be, put himself into all his moral acts. Indeed Aristotle makes here the great advance of definitely denying the Socratic doctrine that virtue consists in knowledge, and of abolishing the Platonic distinction between ordinary and philosophic virtue. All moral qualities are, according to him, matters of the will; and arise, in the first instance, not through instruction, but through exercise and education. But in place of Plato’s grandly organic, though still too abstract scheme of the Cardinal Virtues, each of the three partial ones pressing upwards and requiring and completing the others, and all three bound together by the general fourth, we get a more detailed and experimental, but only loosely co-ordinated enumeration and description of the virtuous habits, all of them so many means between two vicious extremes. The purificatory, recollective, self-fleeing, grandly organic, deeply religious tone and drift of Plato’s philosophy, that priceless conviction that we must give all if we would gain all, has disappeared.
Everywhere then we get in Aristotle that noble Greek insistence, upon Action and Energy, upon Reason and Clearness, upon the General and Unification. But at all the chief turning-points we get a conflict between the General, which is alone supposed to be fully true, and the Particular, which is alone supposed to be fully real. And hence we are left with an insufficient apprehension of the inexhaustibleness of all Reality, of its indefinite apprehensibleness but ever inadequate apprehendedness. And above all, as both cause and effect of all this, we find here only a slight and intermittent hold upon the great fact and force of Personality in both God and man. In a word, if in Plato the abstracting process went in general still further than in Aristotle: in Aristotle the supply of experimental material of a spiritual kind which in Plato was ever enriching, supplementing and correcting the abstract reasoning and its results in matters of spirituality, is almost entirely in abeyance.
5. In Plotinus and Proclus.
In the third and last period of Greek Philosophy, we can pass by the Stoic and Epicurean, and also the Sceptical schools. For, great as was their practical importance and influence, these schools never aimed at embracing the totality of life; no one of them ever, as a matter of fact, cultivated more than one side of a purely individual self-education and peace-seeking. They reproduced and continued, on a larger scale, those interesting three minor Socratic schools which themselves had, even during the full times and universal systems of Plato and Aristotle, constituted as it were the backwaters away from the main stream of Greek speculation. The Stoic system carries on the Cynic school; the Epicurean, the Cyrenaic; and the Sceptical, the Megaric. Unity and Rest is monopolized by the Stoic, and Multiplicity and Movement by the Epicurean; whilst the Sceptic attempts to stand apart from and above both. What Socrates, Plato, and Aristotle, living in still many-sided and public-spirited times, had, in their lives and teaching, seen and practised together; now, in a period of spiritual poverty and self-seeking, is seen and practised by separate schools separately, each in external conflict with the other.