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An Essay on the Fundamental Principles of Operative Occultism
Manly P. Hall
An Essay on the Fundamental Principles of Operative Occultism
Source verified · September 2026
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About Manly P. Hall
Manly Palmer Hall was a Canadian-born occultist, lecturer, and prolific author whose work helped popularize comparative esotericism in the twentieth century. His best-known book, The Secret Teachings of All Ages (1928), surveyed symbols, myths, mysticism, and initiatory traditions from a wide range of cultures.
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A Key to Physic, and the Occult Sciences. Opening to Mental View, the System and Order of the Interior and Exterior Heavens; the Analogy betwixt Angels, and the Spirits of Men; and the Sympathy between Celestial and Terrestrial Bodies … [including] Animal Magnetism … To Which are Added, Lunar Tables, Calculated from Sidereal Motion; Exhibiting … the Actual Moment of the Crisis of Every Disease … The Whole Forming an Interesting Supplement to Culpeper’s Family Physician, and Display of the Occult Sciences
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