Scientology also reflects the influence of the Hindu concept of karma, as well as the psychological theories of Sigmund Freud, Carl Jung and William Sargant. Sociologist David G. Bromley of Virginia Commonwealth University characterizes Scientology as "a 'quasi-religious therapy' that resembles Freudian 'depth psychology' while also drawing upon Buddhism, Hinduism, and the ancient, heretical offshoot of Christianity known as gnosticism".

Hubbard sometimes identified himself with Maitreya (sometimes spelled Metteya), a prophesied Buddha of the future. This identification is made most strongly in his 1955–1956 poem Hymn of Asia, which begins with the line "Am I Metteyya? [sic]" and emphasizes certain traits of Hubbard that the editors of the publication said matched traits predicted by the "Metteya Legend", such as Metteya appearing in the West, having golden hair or red hair (Hubbard was red-haired), and appearing in a time of world peril, with the earliest of the predicted dates for his return being 2,500 years after Gautama Buddha, or roughly 1950. According to sociologist Stephen A. Kent, however, the traits which the editors say are predicted by the "Metteya Legend" either are not actually present in the Buddhist texts or in some cases are contradicted by the texts: instead of coming at a time of world peril, for instance, the predictions about Maitreya say he will be born to royalty whose domain is "mighty and prosperous, full of people, crowded and well fed", and rather than having hair "like flames", Kent says that the texts predict curly black hair for the Maitreya.[88]