Higher Psychical Development (Yoga Philosophy): An Outline of the Secret Hindu Teachings

Preface: The following work consists essentially of a series of twelve lectures, delivered before the Psychological Research Society, of New York, in 1918. These lectures were given impromptu, without manuscript, and with no thought at the time of their ultimate publication. Because of this fact, they contain certain minor repetitions, and lack, perhaps, a certain literary quality which they might have contained, had they been written out in advance. I have, however, retained practically their original form, - making only a few verbal changes, - from shorthand notes made at the time.
At the conclusion of every Lecture, a number of questions were asked and answered, and a few of these I have retained - thinking them, perhaps, of especial interest to the general reader. It is hardly necessary to say that the vast majority of these questions and answers have been omitted!
The present book is, in a sense, a sequel to my earlier work, Your Psychic Powers: and How to Develop Them, and the serious student is advised to read that volume first, - if he has not obtained a thorough knowledge of the fundamental groundwork of psychic science. Higher Psychical Development, as its name implies, is a "postgraduate course" for more or less advanced students, and contains information and "secrets" which have never before been published, - so far as I am aware, - in any work in English…