ABSTRACT
The most important sources for the reconstruction of the life of Plato are Diogenes Laertius and the autobiographical testimony of the Letter VII that Plato wrote to the relatives and friends of Dion of Syracuse after he was murdered in Sicily. Plato's works were classified and arranged first in trilogies by Aristophanes of Byzantium, a literary critic and librarian at the Library of Alexandria, including only fifteen dialogues. In the Phaedrus, Plato writes about myth, rhetoric and dialectic, but also about writing and its relation to speech. The most important dialogues in which Plato sets forth, from different perspectives, his conceptions about the nature of the soul are, unquestionably, the Phaedo, Republic and Phaedrus, to which the Timaeus and Laws should to be added. The Phaedo spins around different arguments that aim to demonstrate the immortality of the soul, developed on the basis of the acceptance of the existence and nature of the Ideas.
