οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
crase att. et poét. p. τοῦ ἐπιόντος, gén. sg. part. de ἔπειμι².