We here follow up points of special interest on Gnostic and other texts, including the remarkable Thunder Perfect Mind. Yoga and a science of the mind is implicit in all of them. Our interest is in metaphysical and universal symbolism, we are not overly concerned with factual references, names, dates and places. The surviving fragments of these ancient texts, as with the Yoga-Sutras, have their true origins in times that were already ancient when the Christian Gospels were being composed. The evidence for a yoga practice and science of the mind in those texts will become clear from studying this book. The second part of the book comprises a careful, practical study of the Yoga-Sutras attributed to Patanjali and Vyasa. There is no simplification or dilution of the yoga method, yet that method is clearly explained. The goal of yoga remains the same: union with God, immortality and even final liberation for those rare individuals that will renounce the world.