A healer of others, himself diseased.

Demosthenes, when taunted by Pytheas that all his arguments "smelled of the lamp," replied, "Yes, but your lamp and mine, my friend, do not witness the same labours.

When one is transported by rage, it is best to observe attentively the effects on those who deliver themselves over to the same passion.

To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.

It is wise to be silent when occasion requires, and better than to speak, though never so well.

Of all the disorders in the soul, envy is the only one no one confesses to.

Courage and wisdom are, indeed, rarities amongst men, but of all that is good, a just man it would seem is the most scarce.