IX. Something about the Moon in the Light of Spiritual Science

The ego continues to work on these three members and brings man nearer and nearer to the peak of his developments. But these three members, since they carry out their work through man, have to live in his corporeal structure; in that way only can they accomplish their tasks. The Sentient Soul uses as its instrument the sentient body; the Intellectual Soul uses the etheric body. The Consciousness Soul is the first to use the physical body as bearer and instrument. Thus in man's corporeal structure we have first the physical body, which he has in common with the minerals. Next we have in man a higher part which he has in common with the plant world and everything that lives. The functions of growth, nutrition and reproduction in the plant are active also in man, but in man they are connected with the Intellectual Soul. The plant's etheric body is not permeated by the Intellectual Soul, as is the etheric body in man, just as the physical body is permeated by the Consciousness Soul. That which forms crystals in the mineral realm is permeated in man by the Consciousness Soul. In animals the astral body is the bearer of impulses and emotions; in man the astral body is inwardly deepened and is the bearer of the Sentient Soul. Thus the human soul, made up of Sentient Soul, Intellectual Soul and Consciousness Soul, dwells in his threefold corporeality, in the sentient body, etheric body and physical body respectively.