INTRODUCTION.

the soul is connected with the doctrine of ideas. In the Meno the theory of ideas is based on the ancient belief in transmigration, which reappears again in the Phaedrus as well as in the Republic and Timaeus, and in all of them is connected with a doctrine of retribution. In the Phaedrus the immortality of the soul is supposed to rest on the conception of the soul as a principle of motion, whereas in the Republic the argument turns on the natural continuance of the soul, which, if not destroyed by her own proper evil, can hardly be destroyed by any other. The soul of man in the Timaeus is derived from the Supreme Creator, and either returns after death to her kindred star, or descends into the lower life of an animal. The Apology expresses the same view as the Phaedo, but with less confidence; there the probability of death being a long sleep is not excluded. The Theaetetus also describes, in a digression, the desire of the soul to fly away and be with God—'and to fly to him is to be like him.' The Symposium may be observed to resemble as well as to differ from the Phaedo. While the first notion of immortality is only in the way of natural procreation or of posthumous fame and glory, the higher revelation of beauty, like the good in the Republic, is the vision of the eternal idea. So deeply rooted in Plato's mind is the belief in immortality; so various are the forms of expression which he employs.