This book is univvesally acclaimed as a masterpiece of Sri Swami Sivanandaji Maharaj, whose incomparable works on Yoga & Vednata have been the guiding lights of seekers after Truth all over the world. Sri Swami Sivanandaji, by his precept & practice, has paved the wayfor not only the great goal of Self-realisation but success in life, here & now. A deep study of this volume would compel every reader to put the precept into daily practice: such is the power of Swamiji's persuasion. Such stu-dy & practice would undoubtedly bestow on the deeker great peace & prosperity, health & happi-ness, & eventually, liberation from birth & death. In the wake of a persistent & growing demand for this remarkable guide-book from spiritual seeke-rs of the East & the West, we are releasing this edition. May it inspire many thirsting souls is our humble prayer.