οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
jūge: adv., v. 2. jugis.
iūge, Adv. (iugis), in einem fort, Prud. perist. 10, 472.