Brhadaranyaka Upanishad - This book presents a lucid exposition of select portions of this Upanishad in the light of modern thought and modern needs. The Revered Swami has done this by freely drawing from contemporary scientific thought, biology, and physics, and by laying stress on the relevance of Vedantic ideas to these areas of modern thought.
Brave, bold men and women, these are what we want. What we want is vigor in the blood, strength in the nerves, iron muscles and nerves of steel, not softening namby-pamby ideas. Avoid all these. Avoid all mystery. There is no mystery in religion.
-Swami Vivekananda