In the Phaedo, Socrates, about to drink the hemlock, discusses with his friends why the philosopher does not fear death: the soul is immortal, akin to the Forms, and philosophy is its purification. The dialogue ends with his calm death, one of the most influential scenes in Western literature.
Phaedo
Plato’s dialogue on the last day of Socrates, arguing for the soul’s immortality and philosophy as practice for death.