οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
ἀπορήγνυμι 1 pass burst forth c. gen. λαμπραὶ δ' ἧλθον ἀκτῖνες στεροπᾶς ἀπορηγνᾰμεναι (P. 4.198)