How is it that every morning, after each sleep, the human being returns to his physical body again?

Rudolf Steiner: "How is it that every morning, after each sleep, the human being returns to his physical body again? ... the human being would actually not return if, on entering the planetary movements and the constellations of the fixed stars, he did not also live his way into the forces of the moon while expanding outward into the facsimiles of cosmic existence. He lives his way into the spiritual forces of the moon, into those cosmic forces which are reflected in the physical moon and in the moon-phases. While all other planetary and fixed star forces actually draw the human being out of his physical body, it is the lunar forces which again and again return him, when he wakes, to his physical body. The moon is connected in general with all that brings the human being from his spiritual life into the physical life."