The book by Stanislav Grof, one of the founders of transpersonal psychology and psychotherapy, substantiates a new understanding of the mechanism of action of psychedelics, which, as it turned out, are powerful catalysts for mental processes, capable of significantly accelerating the process of psychotherapy with qualified use. Readers are offered a new cartography of the human psyche, covering both modern and ancient descriptions. The material discussed is of interest to psychologists, psychotherapists, philosophers, mythologists and representatives of other humanitarian professions.