Let the lion of Vedanta roar, and the foxes (of fear and hatred) will fly to their holes', said Swami Vivekananda. It is that lion roar which we get in the Upanishads. And it is precisely this truth that the author of this book tries to uncover and present to the readers. He brilliantly succeeds in bringing out the tremendous potency of the Upanishads in playing the role of a torchbearer illuminating the dark labyrinths of human life and destiny.
Those who have succeeded in attaching or detaching their minds at will have succeeded in Pratyahara, which means gathering towards, checking the outgoing powers of the mind, freeing it from the thralldom of the senses. When we can do this, we shall really possess character; then alone we shall have taken a long step towards freedom. Before that, we are mere machines.
-Swami Vivekananda