The author has organized Swami Vivekananda's ideas to develop a holistic approach based on Vedanta to the problem of understanding and quantifying human development in this book.
Anything that is secret and mysterious in these systems of yoga should be at once rejected. The best guide in life is strength. In religion, as in all other matters, discard everything that weakens you, have nothing to do with it.
-Swami Vivekananda