The healthy eye ought to look on everything visible, and not to say, I want green, like an eye that is diseased. Sound hearing or sense of smell ought to be ready for all that can be heard or smelt; and the healthy stomach should be equally disposed for all sorts of food, as a mill for all that it was built to grind. So also the healthy mind should be ready for all things that happen. That mind which says, Let my children be spared, and let men applaud my every action, is as an eye which begs for green, or as teeth which require soft food.
