But it would be unjust and unfair to the general public were we to fail to add to the above criticism the fact that there is underway a great change in the public opinion regarding this important matter. More and more persons are becoming interested in Nature's Finer Forces every day; more are becoming more familiar with the phenomena manifested by the gifted individuals possessing these wondrous powers; and more are coming to realize that these powers are really latent in all of the members of the human race, though lying dormant in the majority thereof, and may be unfolded and brought into active manifestation by scientific methods of training and development. But, even so, the student and teacher of this great subject should carefully bear in mind the important distinction above made between that which is "abnormal," and that which is "supernormal"; and such should lose no opportunity in pointing out this important distinction whenever the subject arises in conversation or argument--for the propaganda of truth should be earnestly and vigorously pursued, in order that the world may be liberated from its chains of error. The Naturalness of the Occult Powers Returning to the subject considered in the opening paragraphs of this book, namely, the NATURALNESS of the occult and psychic higher powers and the manifestation thereof, we strongly advise all students of these subjects to acquire a working knowledge of the place in Nature occupied by these powers and their manifestations. A little scientific information on this subject will render the student better able to intelligently teach others concerning these matters, and also to successfully defend himself when the ignorant and unthinking seek to attack the things which are so dear to his heart, and so real and evident to himself. Many, by reason of their lack of scientific knowledge on these points, not only fail to make converts to their cause of truth, but often really drive away persons who might otherwise be interested. Many persons are really interested in and attracted to the manifestations of the higher occult and psychic powers, but are fearful of anything "unnatural" or "supernatural," and are disposed to be frightened off by any suspicion of such qualities in things. These same persons, if shown that the phenomena have a perfectly valid scientific base in natural forces and laws, will throw aside their fears and will become earnest investigators and students of this great subject. Hence, as we have said, every teacher and student of this subject should know the true scientific natural basis thereof; and in the following few pages we shall endeavor to plainly, though briefly, present these to you. The World of Vibrations