2nd hardback edition.
Abū Yaʿqūb ibn Ishāq al-Kindī (c.800-870CE) De Radiis (On The Stellar Rays) proposes that all things emit rays that operate on all other things, producing an interplay of causes and effects from the stars down to material objects. The rays pouring down from the celestial harmony of the stars, constellations, and planets, he thought, accounted for the efficacy of astrology. Living beings, likewise, were the source and destination of rays, and humans out of all creatures were a “small world” or microcosm unto themselves, and therefore humans are able to cause things (whether themselves or others) to move and change. Sound “rays”, emitted through speech, song, and music could effect magical change by the same principle.
De Radiis provides a concise, comprehensive physical and magical theory using the philosophy of the Greeks, which Al-Kindi had a hand in translating into Arabic at the start of the Islamic Golden Age. This edition of De Radiis comes from a back translation into Latin from a lost Arabic original. Together with practical manuals of Arab magic, such as Picatrix, the theoretical treatise De Radiis had a profound impact on the Western esoteric tradition during the ensuing thousand years.
This new translation, by Scott Gosnell, translator of The Collected Works of Giordano Bruno and writer on the history and future of science and magic, rendered into clear, fresh language; it is an essential part of any complete esoteric library.