II. Introductory Explanations Concerning the Nature of Man

Why is this third member called astral body?—No more appropriate name could be found for it! Why?—Because this member has an important task which we must bear in mind. At night, this astral body is not inactive, for then it works upon the physical and etheric body, and the clairvoyant seer can observe this. During the day, we use up our physical and etheric body, for everything we do uses up the physical body, and the expression of this is fatigue. Now the astral body repairs what we use up during the day. The astral body really eliminates fatigue while we are asleep. This shows the importance and necessity of sleep. The clairvoyant seer can do this repair-work consciously. The refreshing element of sleep depends on the fact that the astral body has worked in the right way upon the physical and astral bodies. But since the astral body must first return into the physical and etheric bodies, the refreshment of sleep arises gradually, that is to say, about one hour after waking up.