”Still,” it is objected, “laws do not always make us do what we ought to do; and what else are laws than precepts mingled with threats?” Now first of all, the laws do not persuade just because they threaten; precepts, however, instead of coercing, correct men by pleading. Again, laws frighten one out of communicating crime, while precepts urge a man on to his duty.

— Seneca, Ep. XCIV.  On the value of advice