This book is comprised of lectures and talks of Swami Prabhavananda on spiritual life. The Swami had an extraordinary ability to make even the most subtle of enigmatic ideas exciting and comprehensible. He contributed a great deal to the understanding of Vedanta in the West and also facilitated a better understanding of all the religions of the world.
Take up one idea. Make that one idea your life -- think of it, dream of it, live on that idea. Let the brain, muscles, nerves, every part of your body, be full of that idea, and just leave every other idea alone. This is the way to success, and this is the way great spiritual giants are produced. Others are mere talking machines.
-Swami Vivekananda