Travel in the astral body is quite another phase of occult phenomena, and is far more difficult to manifest. The student should never attempt to travel in the astral body except under the instruction of some competent instructor. In Crystal Gazing, the occultist merely employs the crystal in order to concentrate his power, and to bring to a focus his astral vision. There is no supernatural virtue in the crystal itself--it is merely a means to an end; a piece of useful apparatus to aid in the production of certain phenomena. In Psychometry some object is used in order to bring the occulist "en rapport" with the person or thing associated with it. But it is the astral senses which are employed in describing either the past environment of the thing, or else the present or past doings of the person in question, etc. In short, the object is merely the loose end of the psychic ball of twine which the psychometrist proceeds to wind or unwind at will. Psychometry is merely one form of astral seeing; just as is crystal gazing. In what is known as Telekinesis, or movement at a distance, there is found the employment of both astral sensing, and astral will action accompanied in many cases by actual projection of a portion of the substance of the astral body. In the case of Clairvoyance, we have an instance of the simplest form of astral seeing, without the necessity of the "associated object" of psychometry, or the focal point of the crystal in crystal gazing. This is true not only of the ordinary form of clairvoyance, in which the occultist sees astrally the happenings and doings at some distant point, at the moment of observation; it is also true of what is known as past clairvoyance, or astral seeing of past events; and in the seeing of future events, as in prophetic vision, etc. These are all simply different forms of one and the same thing. Surely, some of you may say, "These things are supernatural, far above the realm of natural law--and yet this man would have us believe otherwise." Softly, softly, dear reader, do not jump at conclusions so readily. What do you know about the limits of natural law and phenomena? What right have you to assert that all beyond your customary range of sense experience is outside of Nature? Do you not realize that you are attempting to place a limit upon Nature, which in reality is illimitable? The man of a generation back of the present one would have been equally justified in asserting that the marvels of wireless telegraphy were supernatural, had he been told of the possibility of their manifestation. Going back a little further, the father of that man would have said the same thing regarding the telephone, had anyone been so bold as to have prophesied it. Going back still another generation, imagine the opinion of some of the old men of that time regarding the telegraph. And yet these things are simply the discovery and application of certain of Nature's wonderful powers and forces.