The Memorable Thoughts of Socrates by Xenophon, 431 BC-350? BC

Xenophon (Ancient Greek Ξενοφῶν, Xenophōn; c. 430 – 354 BC), son of Gryllus, of the deme Erchia of Athens, also known as Xenophon of Athens, was a Greek historian, soldier, mercenary, and a contemporary and admirer of Socrates. He is known for his writings on the history of his own times, the 4th century BC, preserving the sayings of Socrates, and descriptions of life in ancient Greece and the Persian Empire.

Xenophon was later exiled from Athens, most likely because he fought under the Spartan king Agesilaus II against Athens at Coronea. However, there may have been contributory causes, such as his support for Socrates, as well as the fact that he had taken service with the Persians. The Spartans gave him property at Scillus, near Olympia in Elis, where he composed the Anabasis. However, because his son Gryllus fought and died for Athens at the Battle of Mantinea while Xenophon was still alive, Xenophon's banishment may have been revoked. Xenophon died in either Corinth or Athens. His date of death is uncertain; historians only know that he survived his patron Agesilaus II, for whom he wrote an encomium. Xenophon had a fond love of Athens but didn't believe in its political morals, which leads some to believe that he was an oligarch.

Summary by wikipedia.org