οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
ἀκατάμαχος: -ον, = τῷ προηγ., Εὐσέβ. Εὐαγγ. Ἀποδ. 424D.
