When the human Will is directed toward a distant person or object, under the proper psychic conditions, it tends to "polarize" a path or channel through the Astral atmosphere toward the desired point, which channel becomes at once an easy course of psychic communication for the transmission or receiving of psychic impressions or expressions, as the case may be. And, in the case of Psychomancy and kindred phenomena, the Astral Senses of the person (even though his Astral Body be still within its physical counterpart) are able to readily "sense" the impressions being manifested at a far distant point in space. The above mentioned channel of communication--the Astral Tube--has not of course the advantages of actual travel in the Astral Body, and is besides affected by certain Astral happenings, such as the breaking up of the tube, or an impairment of its efficiency, by reason of some stronger astral current or channel, etc., for instance. When one considers the currents and cross-currents constantly in operation on the Astral Plane, it will be seen how likely the above mentioned interference is to happen. Through the Astral Tube the Astral Senses actually "sense" the sights, and often the sounds being manifested at a distance, just as one may see distant sights through a telescope, or hear distant sounds through a telephone, for instance. It also may be used as a microscope, as we shall see as we proceed. The student's attention is especially directed toward the fact that in this form of phenomena, the Psychomancer remains within his physical body, and does not travel in the Astral at all. He sees the distant scenes, just as a man sees them through a telescope. His consciousness remains within his physical body.