The book of Swami Sivananda, the great Yoga Teacher and metaphysician, is truly an encyclopedia covering more than sixty systems of yoga, practical spirituality, self-knowledge and service to humanity. This book, compiled from the Teacher’s conversations and articles, has gone through dozens of reprints in many languages of the world and has taken an honorable place in the spiritual world heritage. It presents the foundations of a single metaphysical tradition that reveals eternal wisdom and provides unique and effective methods of self-realization. Every word of the book is filled with inspiration, purity and light, and each new chapter opens the gates to spaces of freedom, love and unity. Published in Russian for the first time.