Ascened Masters, in the Ascended Master Teachings derived from Theosophy, are believed to be spiritually enlightened beings who in past incarnations were ordinary humans, but who have undergone a process of spiritual transformation. The term "Ascended Master" was first introduced by theosophists in 1934 with the publication of Unveiled Mysteries by Guy Ballard in The "I AM" Activity. This term was further popularized by other theosophists in books like The Bridge to Freedom (1951), The Summit Lighthouse (1958), The Temple of The Presence (1995), and various other organizations.