An innovative and revolutionary book that establishes a radical new psychology based on an expanded mapping of the human unconscious.

Famous for his research on psychedelic drugs, Dr. Grof constructs a comprehensive and useful framework from the wide range of experiences induced by LSD in patients and research subjects. The current research on the brain and the methods of expanding consciousness gives this foundational book, first published in 1979, new significance for the light it sheds on many fundamental, yet until now mysterious, human potentials.

Grof's theory of the human psyche transcends the personal and paves the way for a greater understanding of our inner self.