Laudem virtutis necessitati damus. - Quintilian

But I fancy that I hear some (for there will never be wanting men who would rather be eloquent than good) saying "Why then is there so much art devoted to eloquence? Why have you given precepts on rhetorical coloring and the defense of difficult causes, and some even on the acknowledgment of guilt, unless, at times, the force and ingenuity of eloquence overpowers even truth itself? For a good man advocates only good causes, and truth itself supports them sufficiently without the aid of learning."

Sit ergo nobis orator quem constituimus is qui a M. Catone finitur vir bonus dicendi peritus, verum, id quod et ille posuit prius et ipsa natura potius ac maius est, utique vir bonus.

Those who wish to appear wise among fools, among the wise seem foolish.