οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
subs.
P. and V. κατήγορος, ὁ, ἡ.
Prosecutor: P. and V. ὁ διώκων.
Malicious accuser: Ar. and P. συκοφάντης, ὁ.