οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
-ου, τόlechón op. τέλεον Sokolowski 2.22.8 (Epidauro IV a.C.), cf. ἀπάλιον· θῦμα, δελφάκιον Hsch.