The unexamined life is not worth living.
— Socrates, 399 BCIn Plato's account, Socrates says it at his trial in 399 BC, after his conviction.
12 Reflections
Plato, Apology 38a, translated by Benjamin Jowett
Socrates wrote nothing; he is known mainly through his students' accounts, Plato's among them. Convicted of impiety and corruption, with Anytus proposing death, he had to name a penalty of his own. Someone may ask, he says, why he cannot hold his tongue and live quietly in a foreign city. That, he answers, would disobey the god; and daily talk about virtue, examining himself and others, is the greatest good of man.
The famous line is his reason for refusing that way out. The Greek ends 'for a human being', which Jowett leaves out. Examining what one believes, with others, is what makes a human life worth living. Socrates says the jury will believe this even less, yet he will not trade it for safety.