"Phaedo" is a philosophical dialogue of the ancient Greek philosopher Plato, which took place at the time of Socrates' death. This work examines such important questions as the immortality of the soul, the nature of knowledge, and morality. The main idea of the book is to emphasize the inner perfection and spiritual development of a person. The author uses the story of the last hours of Socrates' life to reveal philosophical concepts that still remain relevant for the modern world. "Phaedon" remains one of the most important works in world philosophy, which encourages the reader to think deeply about the meaning of life and one's own values.