This book describes the transformative power of the ancient sciences of alchemy and Kabbalah. It shows how our human consciousness can expand to perceive matter and energy invisible to the flesh. Samael Aun Weor remains largely unknown in the English-speaking world. But in his native Latin America, he is known internationally as the founder of the very widespread Gnostic Movement and writer of over seventy books about the universal cosmic religion from which all mystical and religious traditions blossomed. In recent years, due to the efforts made by a small handful of people who arrived in English-speaking countries in order to share their experience and enthusiasm for the practical and effective science of Gnosis, interest in Samael Aun Weor has been growing.