For over three decades, Swami Vishnudevananda traveled far and wide. He founded the Sivananda Yoga Vedanta Centers, with many branches both in the West and in India. The lectures which are presented in this book were recorded in many countries, in public halls, during group meditations (satsaṅgs), in Teachers’ Training Courses and symposia. These inspiring live teachings expand the practical aspects of haṭha yoga which Swami Vishnudevananda himself taught to people all over the world.