The peace we experience during sleep cannot be compared with the peace we experience under the form of 'rest' in a comfortable chair or couch, or material 'comfort' in the house or elsewhere. The life we experience during sleep is outside a wall, a prison wall, the pains and diseases of this world are during the time in prison. In the waking state we are in 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 man experiences a life which is above this mortal existence.