οὐ γὰρ πράξιν ἀγαθὴν, ἀλλὰ καὶ εὖ ποεῖν αὐτὴν → it does not suffice to do good–one must do it well
ὀρθολογῶ, -έω (Α)μιλώ σωστά, εκφράζομαι ορθά, ορθοεπώ.[ΕΤΥΜΟΛ. < ορθ(ο)- + -λογῶ].