The hardness of flint is known to none so well as to those who strike it. I offer myself to all attacks, like some lonely rock in a shallow sea, which the waves never cease to beat upon from whatever quarter they may come, but which they cannot thereby move from its place nor yet wear away, for however many years they may unceasingly dash against it. Bound upon me, rush upon me, I will overcome you by enduring your onset: whatever strikes against that which is firm and unconquerable merely injures itself by its own violence. Wherefore, seek some soft and yielding object to pierce with your darts. But have you leisure to peer into other men's evil deeds and to sit in judgment upon anybody? To ask how it is that this philosopher has so roomy a house, or that one so good a dinner? Do you look at other people's pimples while you yourselves are covered with countless ulcers? This is as though one who was eaten up by the mange were to point with scorn at the moles and warts on the bodies of the handsomest men.