The soul is described in magnificent language as the self-moved and the source of motion in all other things. This is the philosophical theme or proem of the whole. But ideas must be given through something, and under the pretext that to realize the true nature of the soul would be not only tedious but impossible, we at once pass on to describe the souls of gods as well as men under the figure of two winged steeds and a charioteer. No connection is traced between the soul as the great motive power and the triple soul which is thus imaged. There is no difficulty in seeing that the charioteer represents the reason, or that the black horse is the symbol of the sensual or concupiscent element of human nature. The white horse also represents rational impulse, but the description in 253, “a lover of honour and modesty and temperance, and a follower of true glory,” though similar, does not at once recall the “spirit” (θυμὸς) of the Republic. The two steeds really correspond in a figure more nearly to the appetitive and moral or semi-rational soul of Aristotle. And thus, for the first time perhaps in the history of philosophy, we have represented to us the threefold division of psychology. The image of the charioteer and the steeds has been compared with a similar image which occurs in the verses of Parmenides; but it is important to remark that the horses of Parmenides have no allegorical meaning, and that the poet is only describing his own approach in a chariot to the regions of light and the house of the goddess of truth.
The triple soul has had a previous existence, in which following in the train of some god, from whom she derived her character, she beheld partially and imperfectly the vision of absolute truth. All her after existence, passed in many forms of men and animals, is spent in regaining this. The stages of the conflict are many and various; and she is sorely let and hindered by the animal desires of the inferior or concupiscent steed. Again and again she beholds the flashing beauty of the beloved. But before that vision can be finally enjoyed the animal desires must be subjected.
The moral or spiritual element in man is represented by the immortal steed which, like θυμὸς in the Republic, always sides with the reason. Both are dragged out of their course by the furious impulses of desire. In the end something is conceded to the desires, after they have been finally humbled and overpowered. And yet the way of philosophy, or perfect love of the unseen, is total abstinence from bodily delights. “But all men cannot receive this saying”: in the lower life of ambition they may be taken off their guard and stoop to folly unawares, and then, although they do not attain to the highest bliss, yet if they have once conquered they may be happy enough.
The language of the “Meno” and the “Phaedo” as well as of the “Phaedrus” seems to show that at one time of his life Plato was quite serious in maintaining a former state of existence. His mission was to realize the abstract; in that, all good and truth, all the hopes of this and another life seemed to centre. To him abstractions, as we call them, were another kind of knowledge—an inner and unseen world, which seemed to exist far more truly than the fleeting objects of sense which were without him. When we are once able to imagine the intense power which abstract ideas exercised over the mind of Plato, we see that there was no more difficulty to him in realizing the eternal existence of them and of the human minds which were associated with them, in the past and future than in the present. The difficulty was not how they could exist, but how they could fail to exist. In the attempt to regain this “saving” knowledge of the ideas, the sense was found to be as great an enemy as the desires; and hence two things which to us seem quite distinct are inextricably blended in the representation of Plato.
Thus far we may believe that Plato was serious in his conception of the soul as a motive power, in his reminiscence of a former state of being, in his elevation of the reason over sense and passion, and perhaps in his doctrine of transmigration. Was he equally serious in the rest? For example, are we to attribute his tripartite division of the soul to the gods? Or is this merely assigned to them by way of parallelism with men? The latter is the more probable; for the horses of the gods are both white, i.e. their every impulse is in harmony with reason; their dualism, on the other hand, only carries out the figure of the chariot. Is he serious, again, in regarding love as “a madness”? That seems to arise out of the antithesis to the former conception of love. At the same time he appears to intimate here, as in the “Ion,” “Apology,” “Meno,” and elsewhere, that there is a faculty in man, whether to be termed in modern language genius, or inspiration, or imagination, or idealism, or communion with God, which cannot be reduced to rule and measure. Perhaps, too, he is ironically repeating the common language of mankind about philosophy, and is turning their jest into a sort of earnest. (Compare “Phaedo,” 61 B “Symposium” 218 B) Or is he serious in holding that each soul bears the character of a god? He may have had no other account to give of the differences of human characters to which he afterwards refers. Or, again, in his absurd derivation of μαντικὴ and
