On an average humans and entire animal kingdom spend 1/3rd of their entire life sleeping. However, during the sleep process your body is never at rest. Your digestive system is working, your heart is pumping, your kidneys are doing their function and entire human body is working like a factory at night digesting foods and repairing cells which were damaged.
So where does the question of REST comes ? Is sleep a mechanism for rest or something higher?
Watch this video to know some of the best answers to the secrets of sleep and its connection with your subconscious mind.