The Apology of Socrates, written by Plato, is a Socratic dialogue of the speech of legal self-defence which Socrates spoke at his trial for impiety and corruption in 399 BC.
Bust of Socrates. Marble, Roman artwork (1st century), possibly a copy of a lost bronze statue by Lysippos.
Plato, born Aristocles, was an ancient Greek philosopher of the Classical period who is considered a foundational thinker in Western philosophy and an innovator of the written dialogue and dialectic forms. He raised problems for what became all the major areas of both theoretical philosophy and practical philosophy, and was the founder of the Platonic Academy, a philosophical school in Athens where Plato taught the doctrines that would later become known as Platonism.
Roman copy of a portrait bust c. 370 BC
Plato was one of the devoted young followers of Socrates, whose bust is pictured above.
The mathematical and mystical teachings of the followers of Pythagoras, pictured above, exerted a strong influence on Plato.
Heraclitus (1628) by Hendrick ter Brugghen. Heraclitus saw a world in flux, with everything always in conflict, constantly changing.