evidence: The Athenian philosopher Plato (c. 428-347 B.C.) is one of the most important figures of the Ancient Greek world and the entire history of Western thought. In his written dialogues he conveyed and expanded on the ideas and techniques of his teacher Socrates. [...] Plato was born around 428 B.C., during the final years of the Golden Age of Pericles’ Athens. He was of noble Athenian lineage on both sides. His father Ariston died when Plato was a child. His mother Perictione remarried the politician Pyrilampes. Plato grew up during the Peloponnesian War (431-404) and came of age around the time of Athens’ final defeat by Sparta and the political chaos that followed. He was educated in philosophy, poetry and gymnastics by distinguished Athenian teachers including the philosopher Cratylus. [...] Plato is credited with coining several phrases that are still popular today. Here are some of Plato’s most famous quotes: