Chapter III: Sleep And Death
As food and other necessities are received by the physical body from its environment, so do the pictures of the astral body's environment come to it during sleep. The fact is that the astral body is then living, outside the physical and the etheric, in the great Universe—the selfsame Universe out of which the entire man is born. For in that Universe is the source of the creative patterns,--the archetypal pictures to which man owes his form. In his true being he belongs to the great Universe and is in harmony with it. In waking life he detaches himself from the all-embracing harmony, in order to have outer perceptions. In sleep his astral body returns into the harmony of the Universe, whence on awakening he brings sufficient force into his bodies to enable him for a time once more to forgo the sojourn there.