Prof. Collins offers a rare combination of sensitivity, scholarship, and insight in traditional models of spiritual growth as they relate to those innovative models of the human mind that will shape our self-understanding in the twenty-first century. -- Ulrike Wiethaus Ph.D, Ph.D. Collins's clear writing style, ability to tell stories, and frequent summaries make this book accessible and engaging for beginner and veteran. Critical Review of Books on Religion Collins offers a plausible matrix of mysticism, articulating both types of mystical traditions and levels of personal attainment...his presentation of the current, often arcane debate about the psychology of mysticism is both clear and helpful. The book makes a clear contribution to the growing field of mysticism studies. -- Robert K. C. Forman, Ph.D, Hunter College