2010 Reprint of 1905 edition.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 consciousness: the simple consciousness of animals, the self-consciousness of the mass of humanity (encompassing reason, imagination, etc.), and cosmic consciousness - an emerging faculty and the next stage of human development. Among the effects of this progression, he believed he detected a lengthy historical trend in which religious conceptions and theologies had become less and less fearful. A classic work.