This book offers guidance about practices that derive their power from elusive or hidden laws of the natural world: astrology, palm reading, fortune telling, the use of talismans and amulets, hypnotism, dream interpretation, and the gift of prophecy. Bô Yin Râ explains that these practices are not necessary for-and should not be confused with-spiritual development. Nevertheless, individuals on the path need to know about these practices because their inner development can be helped, hindered, or even halted by them. Bô Yin Râ points out that ancient peoples were more aligned with the world of nature and natural laws and therefore able to glean insights that are often looked down on in our scientifically oriented world. This is not a scholarly or scientific treatise: What Bô Yin Râ presents are insights gained through his unique capacity to probe reality. This book should be read together with his other books, especially the trilogy consisting of The Book On The Living God, The Book On Life Beyond, and The Book On Human Nature. Contents: Preface. Secret Knowledge and Hidden Science. The Planet's Helping Forces. The Mystery of Dreams. Mantic Arts. Hypnosis. Enigmas of the Future. The Kober Press publishes the only English translations of the books of Bô Yin Râ authorized by the Kober Verlag, Switzerland. The Kober Verlag publishes the books of Bô Yin Râ in the original German and has protected their integrity since the author's lifetime.