Inside this article
Socrates left no book. Yet a life built around conversation became one of philosophy’s defining examples. What can we actually know about him—and what does it mean to examine a belief?
A life preserved by other voices
Socrates lived in Athens in the fifth century BCE and was executed in 399 BCE. Unlike Plato or Aristotle, he left no surviving philosophical treatise. Our main ancient witnesses include Plato, Xenophon and Aristophanes, and their portraits differ sharply. The comic playwright caricatured him; Xenophon often presented a practically minded moral adviser; Plato made him a central figure in dialogues. Reconstructing the historical individual requires comparing these voices rather than treating every scene as stenographic history.
Questions instead of declarations
In many Platonic dialogues, Socrates begins by asking what a familiar word—justice, courage or piety—really means. An answer that seems obvious may lead to a counterexample. The conversation moves through definitions, assumptions and consequences. The method is sometimes called elenchus, or examination through questioning. It does not automatically produce a final definition. Its first result can be the discovery that confident participants understand less than they thought.
What does ‘know yourself’ mean?
The Delphic maxim ‘Know thyself’ predates Socrates, but it captures something that later readers connect with his practice: before claiming to judge the world, examine the limits of your own judgment. Socrates does not simply praise introspection. He insists that ideas face rational testing in conversation with other people. To know the self can include finding out where one’s explanations fail.
The trial and its limits
Athens convicted Socrates on charges involving impiety and corrupting the young. The political and cultural context was complicated, and our accounts are not neutral transcripts. Plato’s Apology is a philosophical representation of the defense; it is important evidence for the Socratic tradition, but historians must still distinguish its literary purposes from what can be independently established about the trial.
How to practise Socratic inquiry
Start with a strong claim such as ‘A good leader never changes their mind.’ Ask for its definition. Find a realistic counterexample. Revise the claim to survive that example. Repeat. The goal is not to win by asking irritating questions; it is to make shared understanding more precise. A useful question is often more valuable than a clever-sounding answer.
What remains open
Scholars debate which views can genuinely be attributed to Socrates and which belong to the developing philosophy of Plato. There is no simple dividing line. This uncertainty is not a reason to ignore the sources: it is part of learning to use them responsibly.