Sophrosyne an important topic for Plato. It is main subject of the dialogue "Charmides", wherein several definitions are proposed but no conclusion reached; however the dramatic context connotes moral purity and innocence. An etymological meaning of sophrosyne as "moral sanity" is proposed in "Cratylus" 411e. Plato's view of sophrosyne is related to Pythagorean "harmonia" ("Republic" 430e−432a, 442c) and closely linked with Plato’s tripartite division of the soul: "sophrosyne" is the harmonious moderation of the appetitive and spirited parts of the soul by the rational part (e.g., "Phaedrus" 237c−238e). For the Stoic, Zeno of Citium, "sophrosyne" is one of the four chief
Ancient Greek structurally and in its vocabulary, to Ancient Greek not present in other varieties. As few as 5,000 people speak the dialect, and linguists believe that it is the closest living language to Ancient Greek. Ancient Greek is often used in the coinage of modern technical terms in the European languages: see English words of Greek origin. Latinized forms of Ancient Greek roots are used in many of the scientific names of species and in scientific terminology. Ancient Greek The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century