The Occult World

The Occult World is Alfred Percy Sinnett's early and influential popularization of Theosophy, built around his claimed correspondence with the Mahatmas Koot Hoomi and Morya. Its central purpose is to present the existence and teachings of these hidden adepts, and the reality of the occult phenomena associated with them, to an educated Victorian public.

The book organizes material drawn from the Mahatma letters into an accessible account of an unseen brotherhood of evolved beings guiding human evolution. It reached a far wider readership than the dense foundational Theosophical writings and, together with Sinnett's later Esoteric Buddhism, helped lend the spiritual-hierarchy concept the prestige of a coherent, quasi-scientific cosmology.

As the work of the movement's great systematizer and popularizer, it made Theosophical ideas intellectually presentable to the Western public. It served as a gateway through which Eastern-flavored notions of graded consciousness, karma, reincarnation, and hidden masters entered Western esoteric culture and, eventually, later ascension teaching.