The author, a Sanskrit scholar from South Africa, has selected 108 gems from the Upanishadic mine and strung them into a fascinating array. The selections have been arranged under suitable headings in an attempt to systematize the thought of the Upanishads.
I am the thread that runs through all these pearls, and each pearl is a religion or even a sect thereof. Such are the different pearls, and God is the thread that runs through all of them; most people, however, are entirely unconscious of it.
-Swami Vivekananda