This pioneering 1893 work of psychic research examines hypnotism and telepathy, suggesting conversations with “spirits” were really encounters with the subconscious. The author discusses the power of suggestion, his interpretation of the teachings of Jesus, and argues that all psychic phenomena are manifestations of the subconscious. The book was popular until after World War I, because the grief-stricken wanted to again believe that mediums could contact the dead.