There are two sentences inscribed upon the Ancient oracle... "Know thyself" and "Nothing too much"; and upon these all other precepts depend.
PlutarchCato requested old men not to add the disgrace of wickedness to old age, which was accompanied with many other evils.
PlutarchThere is no stronger test of a person's character than power and authority, exciting as they do every passion, and discovering every latent vice.
Plutarch