I Have argued elsewhere, and still believe, that the Phaedo was written before Plato's first journey to Italy, when the strong Pythagorean influences displayed in that dialogue were reaching him through the Pythagorean centres on the Greek mainland, in particular Phleius and Thebes; and that in the Republic and Phaedrus it is possible to trace equally strong Pythagorean influence but different in detail, because Plato had now come into contact with the Pythagoreans who still remained in Italy, particularly Archytas. The (...) most remarkable of these influences from whatever source was the doctrine of the immortality and transmigration of the soul, which we know to have been held by the earliest Pythagorean society, and the account of the soul's experience in the world below. (shrink)

In the myth of the Phaedrus Plato sets forth a picture of the life of discarnate souls in heaven. He represents these souls by the symbol of a winged charioteer driving winged horses. In the case of the souls of the gods, the charioteers and horses are good. In the case of the other souls whom Plato calls daimones, and among whom our own souls are included, the soul is represented by a charioteer with two horses of which the right (...) one is good but the left one evil. It is generally agreed that the right and left horses represent thumos and passion respectively, while the charioteer symbolizes reason. Plato goes on to describe a procession which the gods and daimones make up to the outer edge of heaven in order to contemplate the Forms which lie beyond. The gods, we are told, make the ascent easily and when they reach the edge of heaven have no difficulty in staying there and beholding the Forms. The daimones, however, experience difficulty due to the recalcitrance of the evil horse, which all their charioteers possess (247 b Plato divides the daimones into three main groups: those who succeed in beholding the Forms though with difficulty; those whose vision is only partial; those, finally, who fail to see the Forms at all. Since contemplation of the Forms provides the nourishment by which the wings of the soul are nurtured, those daimones who fail to see the Forms at all lose their wings and fall to earth. They have to go through a series of earthly existences for 10,000 years, before they regain their wings and return to heaven. (shrink)

The first part of my hypothesis, then, is simple enough, and would be accepted in principle by most students of Plato: the dramatic structure of the dialogues is an essential part of their philosophical meaning. With respect to the poetic and mathematical aspects of philosophy, we may distinguish three general kinds of dialogue. For example, consider the Sophist and Statesman, where Socrates is virtually silent: the principal interlocutors are mathematicians and an Eleatic Stranger, a student of Parmenides, although one who (...) is not always loyal to his master's teaching of what might be called monadic homogeneity. In these dialogues, the mathematical character of philosophy is not merely emphasized but exaggerated, and any attempt to interpret them must take this fact into account. Otherwise, we shall not be able to understand why the Stranger seems to classify the general's art in the same species of the genus hunting as the louse catcher. The significance of this step, which does not stem from humanitarian considerations, but rather illustrates how the human becomes invisible from the mathematical viewpoint, contributes its share to the obscurity of these two dialogues. Second, there are dialogues like the Phaedrus and Symposium, in which the style, the interlocutors, and even the subject-matter seem to be largely poetic and rhetorical. Here, the overwhelming impression is of enthusiasm, divine madness, and intoxication in speech and deed. Finally, there are dialogues like the Philebus and Republic, in which it is not so easy to say whether poetry or mathematics predominates, if indeed either may be said to do so. (shrink)