New revised and expanded Spanish editions. The definitive introduction to the science and philosophy of yoga meditation. This life-transforming book opens the mind and heart to the spiritual possibilities that exist everywhere and in everything. It reads like an adventure story while answering questions about religion, God, existence, yoga, higher consciousness, and the challenges of daily spiritual living. It is a book for people of all faiths; anyone yearning to know what life is truly all about. Includes extensive material added by the author after the first edition was published, including a final chapter on the closing years of his life.