Yoga which combines philosophy with physiology—is both an art and a science. This book will explain how the body finds pleasure in the laws of nature, peace of mind in renunciation and selfless service, and bliss of the Self in loving devotion to God. And how Yoga leads its practitioner from gross to subtle, from unreal to real, from negative to positive, from darkness (ignorance) to light (knowledge), and from death to immortality. It will also explain how Yoga makes the body firm and free from ailments.