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.
Are you unselfish? That is the question. If you are, you will be perfect without reading a single religious book, without going into a single church or temple.
-Swami Vivekananda