Any fairly considerable acquaintance with the literature of occult research—including in that broad designation records of any supermaterial phenomena—will put any man in a position in which he must either believe in the existence of the invisible world, or discover that he is an irrational being, whose “convictions” are merely acts of submission to the decrees of the multitude. And then, for most of those who perceive that they must believe, or who find that they cannot continue to disbelieve, some personal contact with some phases of the invisible world will probably follow in the sequence of events; because, once _believing_—once saturated with a complete conviction that there are other planes of Nature—these will present themselves to the mind as so interesting, that it becomes worth while to take trouble in order to get the gratification of beholding their phenomena in some way or other; and then success will sooner or later be attained. While people merely think “there _may be_ an invisible world, let us try if we can find it out,” they are easily baffled by failure. They draw one or two covers “blank” and retire from the effort declaring “there is nothing to be discovered; it is all a delusion.” The man who has read and assimilated what he has read is, as we have said above, saturated with a conviction on the subject. His state of mind remains unaffected by personal failure; and still impelled by the fascination of the idea, he will try again and again till he succeeds. When anyone says, “I _wish_ I could see something out of the common way, but I never have any luck in such things,” the answer is: “Then you certainly do not wish _much_.” Probably such people do not wish enough to take the trouble merely to study. What they wish is that conclusive phenomena demonstrating the existence of the invisible world should always be on view at some London theatre, where inquirers might go without liability to disappointment, when other engagements permitted.