Take d**h for example. A great deal of our effort goes into avoiding it. We make extraordinary efforts to delay it and often consider its intrusion a tragic event. Yet we'd find it hard to live without it. d**h gives meaning to our lives. It gives importance and value to time. Time would become meaningless if there were too much of it. If d**h were indefinitely put off, the human psyche would end up, well, like the gambler in the "Twilight Zone" episode.