who said the unexamined life is not worth living

The phrase "The unexamined life is not worth living" was said by Socrates. This quote is most famously recorded in Plato's work "Apology," which is a representation of Socrates' trial in 399 B.C. Socrates used this phrase to emphasize the importance of self-reflection and the pursuit of wisdom in leading a meaningful life. He believed that living without examining one's beliefs, actions, and purpose lacks true value and meaning, and this idea was central to his philosophy and his defense during his trial where he was ultimately sentenced to death.