'Who would you say knows himself?' In 399 BCE Socrates was tried in Athens on charges of irreligion and corruption of the young, convicted, and sentenced to death. Like Plato, an almost exact contemporary, in his youth Xenophon (c. 430-c. 354 BCE) was one of the circle of mainly upper-class young Athenians attracted to Socrates' teaching. His Memorabilia is both a passionate defence of Socrates against those charges, and a...