The main object of this book is to discuss the science of Yoga in as simple and rational a manner as possible, and also to debunk some of the nonsense that continues to be said and believed on the subject. A must for all those are eager to clarify their conception about Yoga.
Those who die, merely suffering the woes of life like cats and dogs, are they human beings? The worthy are those who, even when agitated by the sharp interaction of pleasure and pain, are discriminating and, knowing them to be of an evanescent nature, become passionately devoted to the Atman. This is all the difference between human beings and animals.
-Swami Vivekananda