A special feature of the book is that the learned Swamiji quotes copiously from various Srutis, Smritis and Puranas as also from different orthodox commentators to explore the real meaning of the Mantras of the Ishopanishad.
No authority can save us, no beliefs. If there is a God, all can find Him. No one needs to be told it is warm; all can discover it for themselves. So it should be with God. He should be a fact in the consciousness of every person.
-Swami Vivekananda