" 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. "

― Alan W. Watts , The Wisdom of Insecurity: A Message for an Age of Anxiety