I always wondered why we need to sleep. I can lay down and not move a muscle and my body gets rest. But if I quiet my mind and try my hardest not to think about anything, that still wont be the same as rest for my brain from sleep. I wonder if our consciousness(real us) is located somewhere else out there in the universe and it needs to go back each day for a little bit for whatever reason I dont know. I think consciousness and need for sleep are interrelated because I think the purpose of sleep is to be unconscious for a little bit.