During the deep sleep a person is usually conscious of nothing. When he wakes up, he feels refreshed and renewed. What are we doing while we are fast asleep? The soul then is released from the hold of body and mind. It is free, it goes to its own element, to the highest spheres, and it enjoys being there. It is happy, it experiences all the happiness, all the wisdom of those spheres, it enjoys all bliss, and peace.