It is in vain that doctors prolong life if we spend the extra time being anxious to live still longer. - Alan Watts

As social change increases in speed, how are geneticists to foresee the adaptations of taste, temperament, and motivation that will be necessary twenty or thirty years ahead? Furthermore, every act of interference with the course of nature changes it in unpredictable ways. A human organism which has absorbed antibiotics is not quite the same kind of organism that it was before, because the behavior of its microorganisms has been significantly altered. The more one interferes, the more one must analyze an ever-growing volume of detailed information about the results of interference on a world whose infinite details are inextricably interwoven.

Logic, intelligence, and reason are satisfied, but the heart goes hungry.

Human desire tends to be insatiable. We are so anxious for pleasure that we can never get enough of it. We stimulate our sense organs until they become insensitive, so that if pleasure is to continue they must have stronger and stronger stimulants. In self-defense the body gets ill from the strain, but the brain wants to go on and on. The brain is in pursuit of happiness, and because the brain is much more concerned about the future than the present, it conceives happiness as the guarantee of an indefinitely long future of pleasures. Yet the brain also knows that it does not have an indefinitely long future, so that, to be happy, it must try to crowd all the pleasures of Paradise and eternity into the span of a few years.