In many of Plato's Dialogues we see no more than the ordered reflex of this process, informal as it was in the actual practice of Socrates. Out of the accidents of a conversation, as from the confused currents of life and action, the typical forms of the vices and virtues emerge in definite outline. The first contention of The Republic, for instance, is to establish in regard to the nature of Justice, terms as exactly conterminous with thoughts, thoughts as exactly conterminous with moral facts, as the notion of carbon is for the naturalist, when it has come to include both charcoal and the diamond, on the basis of the essential law of their operation as experience reveals it. Show us, not merely accidental truths about it; but, by the doing of what (Ti poiousa)+ in the very soul of its possessor, itself by itself, Justice is a good, and Injustice a bad thing. That illustrates exactly what is meant by "an idea," the force of "knowledge through ideas," in the particular instance of Justice. It will include perhaps, on the one hand, forms of Justice so remote from the Justice of our everyday experience as to seem inversions of it; it will clearly exclude, on the other hand, acts and thoughts, not it, yet, phenomenally, so like it, as to deceive the very gods; and its area will be expanded sufficiently to include, not the individual [163] only, but the state. And you, the philosophic student, were to do that, not for one virtue only, but for Piety, and Beauty, and the State itself, and Knowledge, and Opinion, and the Good. Nay, you might go on and do the same thing for the physical, when you came to the end of the moral, world, were life long enough, and if you had the humour for it:—for Motion, Number, Colour, Sound. That, then, was the first growth of the Platonic ideas, as derived immediately from Socrates, whose formal contribution to philosophy had been "universal definitions," developed "inductively," by the twofold method of "inclusion" and "exclusion."
Aristotle adds, however, that Socrates had stopped at the point here indicated: he had not gone on, like some others, to make those universal notions or definitions "separable"—separable, that is to say, from the particular and concrete instances, from which he had gathered them. Separable: chôristos + (famous word!) that is precisely what general notions become in what is specially called "the Platonic Theory of Ideas." The "Ideas" of Plato are, in truth, neither more nor less than those universal definitions, those universal conceptions, as they look, as they could not but look, amid the peculiar lights and shadows, in the singularly constituted atmosphere, under the strange laws of refraction, and in the proper perspective, of Plato's house of thought. By its peculiarities, subsequent thought—philosophic, [164] poetic, theological—has been greatly influenced; by the intense subjectivities, the accidents, so to speak, of Plato's genius, of Plato himself; the ways constitutional with him, the magic or trick of his personality, in regarding the intellectual material he was occupied with—by Plato's psychology. And it is characteristic of him, again, that those peculiarities of his mental attitude are evidenced informally; by a tendency, as we said, by the mere general tone in which he speaks of Beauty, for instance, "as it really is," of all that "really is," under its various forms; a manner of speaking, not explicit, but veiled, in various degrees, under figures, as at the end of the sixth book of The Republic, or under mythological fantasies, like those of the Phaedrus. He seems to have no inclination for the responsibilities of definite theory; for a system such as that of the Neo-Platonists for instance, his own later followers, who, in a kind of prosaic and cold-blooded transcendentalism, developed as definite philosophic dogma, hard enough in more senses than one, what in Plato is to the last rather poetry than metaphysical reasoning—the irrepressible because almost unconscious poetry, which never deserts him, even when treating of what is neither more nor less than a chapter in the rudiments of logic.
The peculiar development of the Socratic realism by Plato can then only be understood [165] by a consideration of the peculiarities of Plato's genius; how it reacted upon those abstractions; what they came to seem in its peculiar atmosphere. The Platonic doctrine of "Ideas," as was said, is not so much a doctrine, as a way of speaking or feeling about certain elements of the mind; and this temper, this peculiar way of feeling, of speaking, which for most of us will have many difficulties, is not uniformly noticeable in Plato's Dialogues, but is to be found more especially in the Phaedo, the Symposium, and in certain books of The Republic, above all in the Phaedrus. Here is a famous passage from it:—
There (that is to say, at a particular point in a sort of Pythagorean mental pilgrimage through time and space) there, at last, its utmost travail and contest awaits the soul. For the immortal souls, so-called, when they were upon the highest point, passed out and stood (as you might stand upon the outside of a great hollow sphere) upon the back of the sky. And as they stand there, the revolution of the spheres carries them round; and they behold the things that are beyond the sky. That supercelestial place none of our poets on earth has ever yet sung of, nor will ever sing, worthily. And thus it is: for I must make bold to state the truth, at any rate, especially as it is about truth, that I am speaking. For the colourless, and formless, and impalpable Being, being in very truth of (that is, relative to) the soul, is visible by reason alone as one's guide. Centered about that, the generation, or seed, genos,+—the people, of true knowledge inhabits this place. As, then, the intelligence of God, which is nourished by pure or unmixed reason and knowledge (akêratô,+ unmixed with sense) so, the intelligence of every other soul also, which is about to receive that which properly belongs to it, beholding, after long interval, that which is, loves [166] it (that's the point!) and by the vision of truth is fed; and fares well; until, in cycle, the revolving movement brings it round again to the same place. And in that journey round it looks upon justice itself; it looks upon Temperance, upon Knowledge; not that knowledge to which the process of becoming (the law of change, namely, of birth and death and decay) attaches; nor that which is, as it were, one in one thing, another in another, of those things which now we speak of as being; but the knowledge which is in that which in very deed is (tên en tô ho estin on ontos epistêmên ousan)+ and having beheld, after the same manner, all other things that really are, and feasted upon them, being passed back again to the interior of the sky, the soul returned home. Phaedrus, 247.+
Only, as Plato thinks, that return was, in fact, an exile. There, in that attractive, but perhaps not wholly acceptable, sort of discourse, in some other passages like it, Plato has gone beyond his master Socrates, on two planes or levels, so to speak, of speculative ascent, which we may distinguish from each other, by way of making a little clearer what is in itself certainly so difficult.
For Plato, then, not by way of formal theory, we must remember, but by a turn of thought and speech (while he speaks of them, in fact) the Socratic "universals," the notions of Justice and the like, are become, first, things in themselves—the real things; and secondly, persons, to be known as persons must be; and to be loved, for the perfections, the visible perfections, we might say—intellectually visible—of [167] their being. "It looks upon Justice itself; it looks upon Temperance; upon Knowledge."
Hitherto, in the Socratic disputations, the ideas had been creations, serviceable creations, of men's thought, of our reason. With Plato, they are the creators of our reason—those treasures of experience, stacked and stored, which, to each one of us, come as by inheritance, or with no proportionate effort on our part, to direct, to enlarge and rationalise, from the first use of language by us, our manner of taking things. For Plato, they are no longer, as with Socrates, the instruments by which we tabulate and classify and record our experience—mere "marks" of the real things of experience, of what is essential in this or that, and common to every particular that goes by a certain common name; but are themselves rather the proper objects of all true knowledge, and a passage from all merely relative experience to the "absolute." In proportion as they lend themselves to the individual, in his effort to think, they create reason in him; they reproduce the eternal reason for him. For Socrates, as Aristotle understands him, they were still in service to, and valid only in and by, the experience they recorded, with no locus standi beyond. For Plato, for Platonists, they are become—Justice and Beauty, and the perfect State, or again Equality (that which we must bring with us, if we are to apprehend sensible [168] instances thereof, but which no two equal things here, two coins, ever really attain) nay, Couch, or Tree, every general thought, or name of a thing, whatever—separate (chôristos)+ separable from, as being essentially independent of, the individual mind which conceives them; as also of the particular temporary instances which come under them, come and go, while they remain for ever—those eternal "forms," of Tree, Equality, Justice, and so forth.
That, then, is the first stage, or plane, of Platonic transcendentalism. Our common ideas, without which, in fact, we none of us could think at all, are not the consequence, not the products, but the cause of our reason in us: we did not make them; but they make us what we are, as reasonable beings. The eternal Being, of Parmenides, one and indivisible, has been diffused, divided, resolved, refracted, differentiated, into the eternal Ideas, a multiple, numerous, stellar world, so to call it—abstract light into stars: Justice, Temperance as it is, Bravery as it is. Permanence, independency, indefectible identity with itself—all those qualities which Parmenides supposed in the one and indivisible reality—belong to every one of those ideas severally.
It was like a recrudescence of polytheism in that abstract world; a return of the many gods of Homer, veiled now as abstract notions, Love, [169] Fear, Confidence, and the like; and as such, the modern anthropologist, our student of the natural history of man, would rank the Platonic theory as but a form of what he calls "animism." Animism, that tendency to locate the movements of a soul like our own in every object, almost in every circumstance, which impresses one with a sense of power, is a condition of mind, of which the simplest illustration is primitive man adoring, as a divine being endowed with will, the meteoric stone that came rushing from the sky. That condition "survives" however, in the negro, who thinks the discharging gun a living creature; as it survives also, more subtly, in the culture of Wordsworth and Shelley, for whom clouds and peaks are kindred spirits; in the pantheism of Goethe; and in Schelling, who formulates that pantheism as a philosophic, a Platonic, theory. Such "animistic" instinct was, certainly, a natural element in Plato's mental constitution,—the instinctive effort to find anima, the conditions of personality, in whatever pre-occupied his mind, a mind, be it remembered, of which the various functions, as we reckon them, imagination, reason, intuition, were still by no means clearly analysed and differentiated from each other, but participated, all alike and all together, in every single act of mind.
And here is the second stage of the Platonic idealism, the second grade of Plato's departure [170] from the simpler realism of his master, as noted by Aristotle, towards that "intelligible world," opposed by him so constantly to the visible world, into which many find it so hard to follow him at all, and in which the "ideas" become veritable persons. To speak, to think, to feel, about abstract ideas as if they were living persons; that, is the second stage of Plato's speculative ascent. With the lover, who had graduated, was become a master, in the school of love, but had turned now to the love of intellectual and strictly invisible things, it was as if the faculty of physical vision, of the bodily eye, were still at work at the very centre of intellectual abstraction. Abstract ideas themselves became animated, living persons, almost corporeal, as if with hands and eyes. And it is, as a consequence, but partly also as a secondary reinforcing cause, of this mental condition, that the idea of Beauty becomes for Plato the central idea; the permanently typical instance of what an idea means; of its relation to particular things, and to the action of our thoughts upon them. It was to the lover dealing with physical beauty, a thing seen, yet unseen—seen by all, in some sense, and yet, truly, by one and not by another, as if through some capricious, personal self- discovery, by some law of affinity between the seer and what is seen, the knowing and the known—that the nature and function of an idea, as such, would come home most clearly. [170] And then, while visible beauty is the clearest, the most certain thing, in the world (lovers will always tell you so) real with the reality of something hot or cold in one's hand, it also comes nearest of all things, so Plato assures us, to its eternal pattern or prototype. For some reason, the eternal idea of beauty had left visible copies of itself, shadows, antitypes, out of all proportion, in their truthfulness and adequacy, to any copy, left here with us, of Justice, for instance, or Equality, or the Perfect State. The typical instance of an abstract idea, yet pre- occupying the mind with all the colour and circumstance of the relationship of person to person, the idea of Beauty, conveyed into the entire theory of ideas, the associations which belong properly to such relationships only. A certain measure of caprice, of capricious preference or repulsion, would thus be naturally incidental to the commerce of men's minds with what really is, with the world in which things really are, only so far as they are truly known. "Philosophers are lovers of truth and of that which is—impassioned lovers": Tou ontos te kai alêtheias erastas tous philosophous.+ They are the cornerstone, as readers of The Republic know, of the ideal state—those impassioned lovers, erastas,+ of that which really is, and in comparison wherewith, office, wealth, honour, the love of which has rent Athens, the world, to pieces, will be of no more than secondary importance.