These new organs of perception are first of all to be distinguished from those of the physical sense-world by being _active_ organs. Whereas the eye and ear are passive, allowing light and sound to work upon them, it may be said of these perceptive organs of the soul and spirit that, while functioning they are in a perpetual state of activity, and that they seize hold of their objects and facts, as it were, in full consciousness. This gives rise to the feeling that psycho-spiritual cognition is a union with,—a “dwelling within,”—the corresponding facts. These separately evolving psycho-spiritual organs may be compared to “lotus flowers” corresponding to the appearance which they present to the clairvoyant consciousness, as they are formed from the substance of the astral body.(29) Very definite kinds of meditation act upon the astral body in such manner that certain psycho-spiritual organs, the so-called “lotus flowers,” are developed. Any proper meditation undertaken with the view of attaining to imaginative cognition has its effect upon one or another of these organs.(30) A regular course of training arranges and orders the separate exercises to be practised by the occult student, so that these organs may either simultaneously or consecutively attain their suitable development, and on this process the student will have to bring much patience and perseverance to bear. Those, indeed, who are possessed of no more than the average amount of patience with which man, under ordinary conditions of life is endowed, will not reach very far. For it takes a long—often a very long time indeed—before these organs have reached a point at which the occult student is able to use them for observing things in the higher worlds. At this point comes what is known as “illumination,” in contradistinction to the “preparation,” or “purification,” which consists in the practices undertaken for the formation of these organs. (The term “purification” is used because in order to reach certain phases of inner life, the pupil cleanses himself through the corresponding exercises, of that which belongs to the world of sense observation.)