Hiding The Shameful

Isocrates, Orations, To Demonicus, 15-16 (tr. Geroge Norlin):

Whatever is shameful to do you must not consider it honourable even to mention. Accustom yourself to be, not of a stern, but of a thoughtful, mien; for through the former you will be thought self-willed, through the latter, intelligent. Consider that no adornment so becomes you as modesty, justice, and self-control; for these are the virtues by which, as all men are agreed, the character of the young is held in restraint.

Never hope to conceal any shameful thing which you have done; for even if you do conceal it from others, your own heart will know.