The author had quoted from this Upanishad and explained its ideas in several of his lectures, class-talks, and conversations. All this material, spread throughout the nine volumes of his Complete Works, has been brought together in this book for the first time. What makes this compilation a treasure trove of original ideas and masterly insights is that the author goes straight to the heart of the subject to focus on the essentials, and to evolve practical methods from abstract principles.
Always discriminate -- your body, your house, the people around, and the world are all unreal like a dream. Always think that this body is only an inert instrument. And the Atman within is your real nature.
-Swami Vivekananda