οὐκ ἐν τῷ πολλῷ τὸ εὖ, ἀλλ' ἐν τῷ εὖ τὸ πολύ → good is not found in plenty but plenty in good, quality matters more than quantity
middle voice of a derivative of πολίτης; to behave as a citizen (figuratively): let conversation be, live.