Question: Sometimes it seems a shame that we spend one third of our lives in sleep.Sri Chinmoy: Ask your sincerity. If you sincerely need God then you don't have to spend that many hours in sleep. Sincerity has to answer this question: How desperately do you need God? Imagine that somebody is pressing your head under water. You are dying for a breath, your whole being cries only for air. If you need God as much as you would need air if you were in this situation, if God's existence comes first and foremost in your life, and if you feel that you can exist without air, water, food or anybody, but not without God, then you don't have to sleep so many hours. Sincerity is the answer. Your sincerity will solve the problem.
Sri Chinmoy, Reincarnation and evolution, Agni Press, 1977