Sleep is a necessary activity in our life. When we enjoy more and more sound sleep, our temperature and blood pressure both go down, our muscles relax and our heartbeat becomes slower. Sleep also brings relaxation to the ever-active brain which slows down so that we could not think and put pressure on our minds. During our sleep, we are not in the position to think or act consciously. When we wake up after a sound sleep, our temperature and blood pressure rise to normal. Our heartbeat and breathing also become normal and there is no botheration in our mind and we are fully awake and have forgotten most of the dreams. Such are the blessings of sleep.