"It is through 'greater sensibility' that we both enjoy and endure, for the appreciation of beauty is nothing less than the key to survival. Nature has so provided that we actually enjoy most doing and sensing the very things most conducive to our survival; we delight in performing the most vital functions of life, and so simply by enjoying ourselves, we build up more formidable defenses against the powers of destruction than any accumulation of scientific data or learned admonition could provide. We eat long before we are in danger of dying of hunger and drink long before reaching a critical stage of dehydration, simply because we enjoy eating and drinking. If we ate, drank, breathed, and slept only when persuaded by irrefutable scientific demonstration that if we did not do those things we would die, we would not be long in this world. So it is in all things, and creatures as weak and vulnerable as man must cultivate a salutary sense of what is lovely and desirable and what is wrong and threatening, a feeling that hits them long before they can tell just why a thing is to be welcomed or dreaded."