This book is dedicated to Toltec dreaming and vision - unique methods for the development of perception, which make it possible to unimaginably expand a person’s ability to understand the Real World and act in it. It is these methods that largely determine the success of Toltec magic and are a key tool for the total transformation of human nature. The foundations of this discipline are set out in the books of the great mystic and anthropologist of the late twentieth century, Carlos Castaneda. It also offers detailed instructions and techniques developed and tested in practice by the author, as well as detailed descriptions of the altered modes of perception (“worlds of second attention”) that those walking along the path of Transformation deal with. The methodology of the discipline and its theoretical premises are set out in the books " The Mystery of Carlos Castaneda" (1995) and "After Castaneda: Further Research" (2001). This work is an integral part of the general technology of Energy Body Transformation (ETT). Other important methods of nagualism - impeccability, stalking and intention - will be the subject of separate studies. P.S. The title of the book should not be taken literally. Of course. it is impossible to see the nagual, either by ordinary means or by Toltec vision. Always and everywhere we can only talk about the maximum possible approximation of our perception to the true Reality of the nagual. However, in the case of the Toltec path of knowledge, the “breakthrough” to the nagual is so significant that, in giving the title to the book, the author decided to allow himself some poetic license. Alexey Ksendzyuk