The man or woman whose heart is pure, in whom the principles of virtue and morality are innate, is in no danger of being corrupted by the exercise of mediumistic power. The auto-suggestions of such are constantly on the side of virtue, and a corrupt communication could not emanate from such a source. But to the young, whose characters are not formed, and to those whose notions of morality are loose, the dangers of mediumship are appalling. I have felt obliged to draw my illustrations from spirit mediums for the reason that mediumship is the form which subjective activity takes in the Western world. Other forms, however, are being introduced from the Orient, and may soon become common in this country. The Western world is threatened with a revival of the arts of the magician, the conjurer, and the wizard. It may be true, and doubtless is, that the Eastern adepts know more of the practice of subjective arts than is dreamed of by spiritists. The fact that they denounce as dangerous to health, morals, and sanity the practice of mediumship, is a hopeful sign. That they are aware that the power which controls the medium emanates from himself, is demonstrative of their advancement in practical knowledge of the subject. But that they are reliable guides to the safe exercise of subjective power has not been demonstrated. It is certain that they are yet ignorant of the fundamental principles which underlie the science of the soul, for they have yet to learn the law of suggestion, and to appreciate the subtle _rôle_ which that power plays in every psychic phenomenon. Their whole system of spiritual philosophy has been built up in ignorance of that law, and hence they are necessarily subject to the same delusions, arising from the same sources of error, that have misguided all mankind, in all the ages of the world, prior to the discovery of that law. They believe in their power to communicate with the spirits of another world, precisely the same as do the modern spiritists. The foundation of their belief is the same; namely, psychic phenomena produced by themselves, in ignorance of the fundamental laws which govern it. The only difference resides in the fact that the Orientalists have the power to produce a greater variety of startling phenomena, and hence are in possession of greater facilities for deceiving themselves. No advantage, therefore, can be gained by studying their philosophy or practising their arts, except as a means of gaining general information or for purposes of scientific experiment; and the warning against indulging in the indiscriminate practice of mediumship holds good against the too frequent exercise of subjective power in any direction, or for any purpose save that of scientific investigation or healing the sick.