XIII. On the Essential Nature of Illness and Healing

At the starting point of man's development the activity of the etheric body predominates over that of the astral; then, gradually in the course of life, the activity of the latter grows more intense while that of the etheric body retreats. Nor does the etheric body regain, even in sleep, the intensity it had at the beginning of life. It preserves the degree of intensity it has developed in relation to the astral in the course of life.