οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
εὐδίοπτον: τό прозрачность (τῆς θαλάττης Arst.).
