Readers have the opportunity to get acquainted with Claudio Naranjo as a propagandist and disseminator of the teachings of the enneagram, which originated in the little-known school of Sufis in the Middle East. Using all the latest means of psychology, he studied the ancient system of the enneagram and gave it a modern sound. The proposed analysis of personality types using the enneagram is completely different in its goals: it reveals those hidden mechanisms of the human biological machine that are predictable and inevitable. Without limiting himself only to a psychological point of view, he explains how we build all sorts of barriers within ourselves, which we stumble upon as adults, and what we can do with them. For those who decide to follow the path of introspection and self-exploration, the material in the book provides a unique opportunity to prepare yourself to this Work.