This work is the magnum opus of Bucke's career, a project that he researched and wrote over many years. In it, Bucke described his own experience, that of contemporaries (most notably Whitman, but also unknown figures like "C.P."), and the experiences and outlook of historical figures including Buddha, Jesus, Paul, Plotinus, Muhammad, Dante, Francis Bacon, and William Blake. Bucke developed a theory involving three stages in the development of...