Sleep is a daily reminder from God that we are not God. Once a day God sends us to bed like patients with a sickness. The sickness is a chronic tendency to think we are in control and that our work is indispensable. To cure us of this disease God turns us into helpless sacks of sand once a day. How humiliating to the self-made corporate executive that He has to give up all control and become as limp as a suckling infant every day.