Modern society does not attach much importance to the references to "devil" and "hell," for many they are only metaphorical concepts. The practical reality remains completely unknown to the general public. In this book, written during the author's meeting with his students, Samael Aoun Veor shows how to verify the reality of the existence of lower worlds and describes his personal conscious experience of visiting them, as well as the creatures that are there. With ancient methods preserved in the Gnostic tradition, you can learn the true identity of the devil and Lucifer and use the forces of nature to march forward to a higher way of life. Dispelling centuries of beliefs and theories, explaining the essential truths hidden in ancient symbols, the author gives practical steps to acquire your personal experience of learning the truth.