A Roman divorced from his wife, being highly blamed by his friends, who demanded, "Was she not chaste? Was she not fair? Was she not fruitful?" holding out his shoe, asked them whether it was not new and well made. "Yet," added he, "none of you can tell where it pinches me.''
PlutarchNothing can produce so great a serenity of life as a mind free from guilt and kept untainted, not only from actions, but purposes that are wicked. By this means the soul will be not only unpolluted but also undisturbed. The fountain will run clear and unsullied.
Plutarch