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.
Think always, I am ever-pure, ever-knowing, and ever-free. How I can do anything evil? Can I ever be fooled like ordinary people with the insignificant charms of lust and wealth? Strengthen the mind with such thoughts. This will surely bring real good.
-Swami Vivekananda