The Avicennan aestimatio in Fakhr al-Dīn al-Rāzī’s Theory of Talismanic Action at a Distance

In al-Sirr al-Maktūm, a magisterial work on astral magic, the twelfth century Persian philosopher-theologian Fakhr al-Dīn al-Rāzī formulated one of the most sophisticated theories of talismanic action at a distance ever produced in the Islamic world. Al-Rāzī deployed Avicennan psychology to explain how a practitioner’s soul might connect with the celestial spheres, the principles of sublunary change, and ‘blend’ their forces into a talismanic metal idol; then, performing a ritual mimetic of his intended effect, could direct these forces to bring about his objective, from a distance, altering sublunary phenomena in accordance with his will. In constructing this theory, Rāzī drew on the psychologizing Avicennan accounts of thaumaturgy and veridical dreams, foregrounding what was common to both: the internal sense known as the wahm.