"Dr. Naranjo has produced a major work that deserves to be studied, debated, and utilized by professionals and non-professionals alike." --Stanley Krippner, Ph.D. "Claudio has recreated the enneagram of personality types for the practice of inner explorers in this culture, and I consider him to be the premier teacher of this particular scientific tool for the study of consciousness." --John C. Lilly, M.D., author, Center of the Cyclone
