The sacred subject of the eternal, living spiritual culture of the Upanishads and their journey to the West deserves attention of a wider public. This book is a comprehensive treatment of the broad achievements of India's civilization and spiritual culture as it is revealed through the works of Western scholars.
Anything that is secret and mysterious in these systems of yoga should be at once rejected. The best guide in life is strength. In religion, as in all other matters, discard everything that weakens you, have nothing to do with it.
-Swami Vivekananda