III. The Elemental World and the Heaven World. Waking Life, Sleep and Death.

The human being, while he is asleep, lives in his astral body outside his physical and etheric bodies. The fact that he must sink into sleep has deep significance for his whole make-up. Do not imagine that the astral body is inactive and has no work to do during the night while it is outside the physical and etheric bodies. During the day, when the astral body is within the physical and etheric bodies, influences come to it from the outside world, impressions which man receives as a result of the functioning of his own astral body, through his senses, through his activity in the physical world. Feelings and experiences, everything that works in upon him from outside continues on into the astral body. This constitutes the actual feeling and thinking part of man, and the physical body, together with the etheric body, is only the transmitter, the instrument. Thinking and willing take place in the astral body. While the human body is active in the external world during the day, the astral body is receiving impressions all the time. But let us remember, on the other hand, that the astral body is the builder of the etheric and physical bodies. Just as the physical body with all its organs has hardened out of the etheric body, so everything that streams and is active in the etheric body has been born out of the astral body.