Carlos Castaneda's books cannot be properly understood without an understanding of the chakras. This is the only one of Castaneda's books where the topic of the chakras is addressed. Each of the chakras has a specific function in terms of perception. The lower chakras play a role in perception of the world as we know it. The higher chakras play a role in perceptions that are classified as being paranormal such as telepathy, clairvoyance and bilocation. In order to become a sorcerer, one needs to activate these higher chakras. This is where the magical passes come in. These are physical movements that when executed, draw energy in to the chakra system, thereby allowing for the awakening of the perceptual functions of all of the chakras. These are not the only movements that can accomplish the energizing of the chakras. Certain forms of Yoga, and martial arts (T'ai Chi, Chi Kung) are also effective. All of the esoteric paths including those of the Yogin, the Taoists, the Sufi's, the Fourth Way (GI Gurdjieff) and the Theosophists (Rudolf Steiner, HP Blavatsky) involve a physical discipline aimed at the activation of the chakras. All of these paths when followed, allow one to expand one's perceptual capabilities. I recommend reading the Magical Passes for the information contained in the text. This book talks about an energetic force that has "infected" the chakra system of Man, thus preventing Him from accessing the full range of His perceptual abilities. Therefore, in order to become a sorcerer, one must cure oneself of this "infection". For other books that make reference to this negative force: 1) The Active Side of Infinity (Carlos Castaneda), 2) The Path (Esmeralda Arana), 3) Far Journeys (Robert Monroe), 4) In Search of the Miraculous (PD Ouspensky). For information about the chakras and how to activate them: 1) Chakras (Patricia Mercier), 2) Shaman, Healer Sage (Alberto Villoldo).