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 phonology or earlier in the history of Greek, but inscriptions do not show the spelling , which suggests that an affricate pronunciation did not occur in the Classical period. Mycenaean Greek had three labialized velar stops , aspirated, tenuis, and voiced. These derived from PIE labiovelars and from sequences of a velar and , and were similar to the three regular velars of Ancient Greek , except with added lip-rounding. They were written all using the same symbols in Linear B, and are transcribed as "q". In Ancient Greek, all labialized velars merged with other stops: labials , dentals , and