Book of the Luminaries
Abraham Ibn Ezra
After 1148
The Book of the Luminaries (Sefer ha-me’orot) is a work of medical astrology dealing with the effects that the sun and moon (the “luminaries”) have on the course of a disease. Ibn Ezra composed two versions of Sefer ha-me’orot, the first in Béziers, southern France, in 1148 and the second sometime thereafter, perhaps in northern France or in London. Like many of his other writings, it was translated into Latin. These excerpts describe the sun and the moon, their motion and other characteristics, and the obvious effects they have on the sublunar world, on which, Ibn Ezra points out, astrologers have based their discipline. Unusually for Ibn Ezra’s more technical astrological works, the descriptions weave in biblical language, primarily from the creation story in Genesis. The last excerpt shows Ibn Ezra responding to a typical objection to medical astrology.
Related Guide
Intellectual Culture in the Early Medieval World
Creator Bio
Abraham Ibn Ezra
Abraham ben Meir Ibn Ezra was a remarkably productive itinerant intellectual who contributed to an astonishing array of fields, including biblical exegesis, science, mathematics, grammar, astronomy, astrology, piyyut (liturgical poetry), and philosophy. Born in Toledo, in al-Andalus (Muslim Spain), in the first part of his life Ibn Ezra moved in elite circles, for the most part writing poetry, and enjoyed a close relationship with the poet and theologian Judah ha-Levi. Around the age of fifty, Ibn Ezra fled Almohad persecutions in his homeland and traveled to Italy, northern France, and England. Most of his scientific writings date to this period, including numerous works on astrology, number theory, and grammar. His biblical commentaries, which were concerned with the straightforward meaning of scripture but also incorporated philosophical and scientific insights, were enormously popular. In later centuries, they attracted many supercommentaries , namely, commentaries on his commentary
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