Human nature enjoys nothing better than to wonder--to be mystified; and it thanks and remembers those who have the skill to gratify this craving. The magicians of old knew that truth and conducted themselves accordingly. But our modern wonder-workers fail of their due influence, because, not content to perform their marvels, they go on to explain them. Merlin and Roger Bacon were greater public benefactors than Morse and Edison. Man is--and he always has been and will be--something else besides a pure intelligence: and science, in order to become really popular, must contrive to touch man somewhere else besides on the purely intellectual side: it must remember that man is all heart, all hope, all fear, and all foolishness, quite as much as he is all brains. Otherwise, science can never expect to take the place of superstition, much less of religion, in mankind's affection. In order to be a really successful man of science, it is first of all indispensable to make one's self master of everything in nature and in human nature that science is not. What must one do, in short, in order to become a magician? I use the term, here, in its weightiest sense. How to make myself visible and invisible at will? How to present myself in two or more places at once? How answer your question before you ask it, and describe to you your most secret thoughts and actions? How shall I call spirits from the vasty deep, and make you see and hear and feel them? How paralyze your strength with a look, heal your wound with a touch, or cause your bullet to rebound harmless from my unprotected flesh? How shall I walk on the air, sink through the earth, pass through stone walls, or walk, dry-shod, on the floor of the ocean? How shall I visit the other side of the moon, jump through the ring of Saturn, and gather sunflowers in Sirius? There are persons now living who profess to do no less remarkable feats, and to regard them as incidental merely to achievements far more important. A school of hierophants or adepts is said to exist in Tibet, who, as a matter of daily routine, quite transcend everything that we have been accustomed to consider natural possibility. What is the course of study, what are the ways and means whereby such persons accomplish such results?