He has made it a matter of conscience, when writing or speaking on occult science, to deal only with matters on which he could also report, in what seemed an adequate manner, the views held by modern science. With this, however, he does not wish in the least to give the impression that this is always a necessary prerequisite. Any one may feel a call to communicate or to publish whatever his judgment, his sense of truth, and his feelings may prompt him to, even if he is ignorant of the attitude taken by contemporary science in the matter. The writer wishes to indicate merely that he holds to the pronouncements he has made. For instance, he would never have written those few sentences on the human glandular system, nor those regarding man’s nervous system, contained in this volume, were he not in a position to discuss both subjects in the terms used by the modern scientist, when speaking of the glandular and nervous systems from the standpoint of science. In spite of the fact that it may be said that he who speaks concerning “heat,” as is done here, knows nothing of the elements of modern physics, yet the author feels himself quite justified, because he believes that he knows present day research along those lines, and because if it were unknown to him, he would have left the subject alone. He knows that such utterances may be ascribed to lack of modesty, but it is necessary to declare his true motives, lest they should be confounded with others of a very different nature, a result infinitely worse than a verdict of mere vanity. He who reads this book as a philosopher, may well ask himself, “Has this author been asleep to present day research in the field of the theory of cognition? Had he never heard of the existence of a man called Kant?” this philosopher might ask, “and did he not know that according to this man it was simply inadmissible, from a philosophic point of view, to put forward such statements?” and so on, while in conclusion he might remark that stuff of so uncritical, childish, and unprofessional a nature should not be tolerated among philosophers, and that any further investigation would be waste of time. However, here again, for reasons already advanced and at the risk of being again misinterpreted, the writer would fain introduce certain personal experiences.