Abstract
The Phaedo and the Symposium are dialogues in which Plato's conception of philosophy is not dissociated of orphic elements and mythical constructions. I propose that the themes of the pre-existence of the soul and the immortality of the soul in the Phaedo and myths told by Aristophanes and Diotima in the Symposium, examined together, provide rich material for understanding the nature and limits of knowledge and philosophy in Plato. I also suggest, before this interpretation, a reading of the "sudden vision of beauty in itself," in Symposium 210e, which takes into account these limits. Knowledge is, from this reading, a dynamic search, much more than intuition of the forms