The vividness of the picture in a psycho-spiritual perception of this kind, whether it remains quite shadowy, like a dim concept, or whether it impresses us as intensively as an outer object, depends altogether upon the clairvoyant’s stage of development. Now, the general impression obtained by the clairvoyant of the etheric body, may be thus described. When the clairvoyant has strengthened his will power to such a degree that, in spite of the fact that an individual stands before him in a physical body, he can abstract his attention from what the physical eye sees,—he is then able to see clairvoyantly into the space occupied by the man’s physical body. Of course, a great increase of will power is necessary, in order to withdraw the attention not only from something in the mind, but from something standing before one, in such a way that the physical impression is quite extinguished. But this increase of will is possible, and is brought about by exercises for the attainment of supersensible cognition. The clairvoyant can then first have a general impression of the etheric body. Within his soul there arises the same inner sensation which he has, let us say, at the sight of a peach blossom; then this becomes vivid, so that he is able to say that the etheric body has the colour of peach blossoms. He next perceives the separate organs and currents of the etheric body. A further description of the etheric body may be given by relating the psychic experiences which correspond to sensations of heat or of sound-impressions, etc., for this etheric body is not merely a colour phenomenon. The astral body and the other principles of the human being, may also be described in like manner. He who takes this into consideration will understand just how descriptions should be taken which are given by occult science. The Astral World As long as we observe the physical world only, the earth, as man’s dwelling place, appears like a separate cosmic body. But when supersensible cognition rises to higher spheres, this separation ceases. Thus one can say that the imagination, when beholding the earth, at the same time also perceives the Moon condition as it has developed up to the present time.