Theosophy (from Greek θεοσοφία theosophia, from θεός theos, divine + σοφία sophia, wisdom; literally "divine wisdom"), refers to systems of speculative philosophy concerning, or investigation seeking direct knowledge of, presumed mysteries of being and nature, particularly concerning the nature of divinity.

Theosophy is considered a part of the broader field of esotericism, referring to hidden knowledge or wisdom that offers the individual enlightenment and salvation. The word esoteric dates back to the 2nd century C.E. The theosophist seeks to understand the mysteries of the universe and the bonds that unite the universe, humanity and the divine. The goal of theosophy is to explore the origin of divinity and humanity, and the end of world, life and humanity. From investigation of those topics theosophists try to discover a coherent description of the purpose and origin of the universe.

The word theosophia appeared in both Greek and Latin in the works of early church fathers as a synonym for “theology”. The theosophoi are “those who know divine matters.” During the Renaissance, use of the term diverged to refer to gnostic knowledge that offers the individual enlightenment and salvation through a knowledge of the bonds that are believed to unite her or him to the world of divine or intermediary spirits. By the 16th century the word theosophy was being used in at least one of its current meanings.

David Vaughan Icke (pronounced /aɪk/, or IKE, born 29 April 1952) is an English writer and public speaker, best known for his views on what he calls "who and what is really controlling the world." Describing himself as the most controversial speaker in the world, he is the author of 19 books and has attracted a global following that cuts across the political spectrum. His 533-page The Biggest Secret (1999) has been called "the Rosetta Stone for conspiracy junkies."

Icke was a well-known BBC television sports presenter and spokesman for the Green Party, when in 1990 a psychic told him he was a healer who had been placed on Earth for a purpose, and that the spirit world was going to pass messages to him so he could educate others. In March 1991 he held a press conference to announce that he was a "Son of the Godhead" – a phrase he said later the media had misunderstood – and the following month told the BBC's Terry Wogan show that the world would soon be devastated by tidal waves and earthquakes. He said the show changed his life, turning him from a respected household name into someone who was laughed at whenever he appeared in public.

Rudolf Joseph Lorenz Steiner (25/27 February 1861 – 30 March 1925) was an Austrian philosopher, social reformer, architect, and esotericist. Steiner gained initial recognition as a literary critic and cultural philosopher. At the beginning of the 20th century, he founded a spiritual movement, Anthroposophy, as an esoteric philosophy growing out of idealist philosophy and with links to Theosophy.

Steiner led this movement through several phases. In the first, more philosophically oriented phase, Steiner attempted to find a synthesis between science and mysticism; his philosophical work of these years, which he termed spiritual science, sought to provide a connection between the cognitive path of Western philosophy and the inner and spiritual needs of the human being. In a second phase, beginning around 1907, he began working collaboratively in a variety of artistic media, including drama, the movement arts (developing a new artistic form, eurythmy) and architecture, culminating in the building of a cultural centre to house all the arts, the Goetheanum. After the First World War, Steiner worked with educators, farmers, doctors, and other professionals to develop numerous practical initiatives, including Waldorf education, biodynamic agriculture, anthroposophical medicine.