I don't need a friend who changes when I change and who nods when I nod; my shadow does that much better.
PlutarchWhen Anaxagoras was told of the death of his son, he only said, "I knew he was mortal." So we in all casualties of life should say "I knew my riches were uncertain, that my friend was but a man." Such considerations would soon pacify us, because all our troubles proceed from their being unexpected.
PlutarchAuthority and place demonstrate and try the tempers of men, by moving every passion and discovering every frailty.
Plutarch