οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
duonus: v. bonusI init.
duŏnus, [arch.], c. bonus : P. Fest. 67.
