When it is said that the ego works on the human principles, on the physical, etheric, and astral bodies, and transforms them in reverse order into Spirit-Self, Life-Spirit, and Spirit-Man, this statement relates to the work of the ego on the human being by means of the highest faculties, the development of which was begun only under earthly conditions. But this transformation is preceded at a lower level by another change, giving rise to the sentient-, the intellectual- or rational-, and the consciousness-soul. For while, in the course of human evolution, the sentient-soul is being formed, changes are taking place in the astral body; the growth of the intellectual-soul expresses itself in transformations in the etheric body; and that of the consciousness-soul in similar transformations in the physical body. Fuller information on this subject has been given in this book in the accounts of the evolution of the earth. Thus in a certain sense we may say that the sentient-soul itself is the result of a transformed astral body, the intellectual- or rational-soul of a transformed etheric body, and the consciousness-soul of a transformed physical body. But we may also say that these three divisions of the soul are parts of the astral body; for example, the consciousness-soul is only possible because it is an astral entity existing in a physical body suited to it. It lives an astral life within a physical body fashioned to be its dwelling place. The Dream State A description of the dream state has been given in another chapter of this book. On the one hand it is to be regarded as a relic of the old picture-consciousness peculiar to man during the Moon evolution, and also during a great part of the evolution of the Earth. Evolution goes forward in such a way that earlier conditions resolve themselves into later ones. And so, in the dream state, there now appears in man a relic of what was once his normal condition. But at the same time this condition from another aspect is different from the old picture-consciousness. For since its development, the ego also has taken part in those activities of the astral body which are carried on during sleep in the dream life. Thus through the presence of the ego there arises in dreams a transformed picture-consciousness. But since the ego does not consciously exercise its authority over the astral body during dream life, nothing belonging to the sphere of that life can be regarded as being really able to lead to a knowledge of higher worlds in an occult sense. Something similar holds good with regard to what is often called vision, premonition, or “second sight.” These arise through silencing the ego and the consequent appearance of remnants of the old condition of consciousness. In spiritual science these are of no value. What may be observed in them cannot in any real sense be regarded as a result of it. The Attainment Of Supersensible Knowledge