The peace we experience during sleep cannot be compared with the peace we experience in the form of rest in a comfortable chair or on a couch, in the form of material comfort at home or elsewhere. The life we experience during sleep is outside a wall, a prison-wall; the pains and diseases of this world are within the prison during this time. In the waking state we are in the prison, our life is unhappy; when fast asleep we are free. The moment sleep comes to a person who is in pain and suffering all his disease is left behind; at that moment he is above all suffering and pain. This shows that during sleep we experience a life which is beyond this mortal existence.