οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
occīsus: a, um, Part. and P. a., from 1. occīdo.
occīsus,¹⁶ a, um, part. de occido 2 || occisissumus Pl. Cas. 694.