The Phaedo is one of the most widely read dialogues written by the ancient Greek philosopher Plato. It claims to recount the events and conversations that occurred on the day that Plato's teacher, Socrates (469-399 B.C.E.), was put to death by the state of Athens.

Why is Phaedo important?

The Phaedo stands alongside the Republic as the most philosophically dense dialogue of Plato's middle period. It contains the first extended discussion of the Theory of Forms, four arguments for the immortality of the soul, and strong arguments in favor of the philosophical life.

What was Phaedo theory?

Plato, in the Phaedo, argued that the soul is inherently indestructible. To destroy something, including the body, is to disintegrate it into its constituent elements; but the soul, as a mental entity, is not composed of parts and is thus an indissoluble unity.