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.