The Great Secret (Paperback)

"DO not look to find in this volume a history of occultism, or a methodical monograph on the subject. To such a work one would need to devote whole volumes, which would of necessity be filled with a great measure of that very rubbish which I wish above all to spare the reader. I have no other aim than to tell as simply as possible what I have learned in the course of some years that were spent in these rather discredited and unfrequented regions."