Man’s intellectual development, the purification and ennobling of his feelings and of the manifestations of his will, are the measure of the degree in which he has transformed the astral body into the Spirit-Self. His religious experiences, as well as many others, are stamped upon the etheric body, making it into the Life-Spirit. In the ordinary course of life this happens more or less unconsciously; so-called initiation, on the contrary, consists in man’s being directed by occult science to the means through which he may quite consciously take in hand this work on the Spirit-Self and Life-Spirit. These means will be dealt with in later parts of this book. In the meantime it is important to show that, besides the soul and the body, the spirit also is working within man. It will be seen later how this spirit belongs to the eternal part of man, as contrasted with the perishable body. But the work of the ego on the astral and etheric bodies does not exhaust its activity, which is also extended to the physical body. A slight effect of the influence of the ego on the physical body may be seen when certain experiences cause a person to blush or turn pale. In this case the ego is actually the occasion of a process in the physical body. Now if through the activity of the ego in man, changes occur influencing the physical body, the ego is really united with the hidden forces of the physical body, that is, with the same forces which bring about its physical processes. Occult science says that during such activity the ego is working on the physical body. This expression must not be misunderstood. It must on no account be supposed that this work is of a grossly material nature. What appears as gross material in the physical body is merely the manifested part of it; behind this are the hidden forces of its being, which are of a spiritual nature. When the ego puts forth its energies in the manner described, it unites itself, not with the outer material manifestation of the physical body, but with the invisible forces which bring that body into being and afterwards cause it to decay. This work of the ego on the physical body can only very partially become clear to man’s consciousness in ordinary life. It can become fully clear only when, under the influence of occult science, man consciously takes the work into his own hands. Then he becomes aware that there is a third spiritual principle within him. It is that which occult science calls the _Spirit-Man_, as contrasted with physical man. (In theosophical literature this “Spirit-Man” is known as Atma.)