From the Middle Ages until the present, the development of astrology among Jews was associated mainly with the name of Abraham Ibn Ezra (1089-1167). His scientific corpus deals with mathematics, astronomy, scientific instruments and tools, and the Jewish calendar; but especially with astrology. This volume is the first product of a larger enterprise-a scientific edition of all twelve Ibn Ezra's astrological treatises-and offers a critical Hebrew text of the two versions of Ibn Ezra's "Sefer ha-Te'amim," the Book of Reasons, accompanied by an annotated translation and commentary. The two treatises presented here were designed by Ibn Ezra to offer "reasons," "explanations," or "meanings" of the raw astrological concepts formulated in the introduction to astrology that Ibn Ezra entitled "Reshit Hokhmah" (Beginning of Wisdom).

This book studies Abraham Ibn Ezra's (1089-1167) scientific thought. His life and oeuvre are viewed as the very embodiment of 'the rise of medieval Hebrew science', a process in which Jewish scholars gradually adopted the holy tongue as a vehicle to express scientific ideas.

Ibn Ezra addresses the importance of the knowledge of grammar, stating that one cannot fully understand the text of the Torah without it. He also discusses the study of the Bible and the Talmud, arguing that one cannot properly comprehend the Talmud if one does not know the sciences, for there are many passages in the Pentateuch and the Talmud that are either incomprehensible or given to misinterpretation by one who has no prior knowledge of the sciences.

The present volume offers a critical edition of the Hebrew texts, accompanied by English translation and commentary of Reshit Ḥokhmah (Beginning of Wisdom) and Mishpeṭei ha-Mazzalot (Judgments of the Zodiacal Signs) by Abraham Ibn Ezra (ca. 1089–ca. 1161). The first, the summa and by far the longest of his astrological works, the target of the most cross-references from the rest of that corpus and the most influential, enjoyed the widest circulation among Jews in the Middle Ages and after. The second, by contrast, is the most obscure. It is never referred to elsewhere by its author and is the only work for which Ibn Ezra’s authorship must be substantiated. Reshit Ḥokhmah and Mishpeṭei ha-Mazzalot were written in order to explain concepts common to the various branches of astrology that Ibn Ezra addressed elsewhere and to elucidate the worldview that underlies astrology. These two treatises are the richest and most varied with regard to the astrological information they present. Reshit Ḥokhmah and Mishpeṭei ha-Mazzalot also exemplify the close collaboration between astronomy and astrology in medieval science and are the two components of Ibn Ezra’s astrological corpus with the most extensive, comprehensive, and significant astronomical content. "A critical edition with English translation of Reshit Ḥokhmah was published in 1998 by Epstein. Sela has not only aspired to improve it but also supplied a commentary to render the text more comprehensible. Sela’s mission is successfully accomplished for both treatises. This multifarious book is another important contribution to a deeper understanding of the life and work of one of the most important medieval Jewish polymaths." - Ilana Wartenberg, Universität Bern, in: Journal for the History of Astronomy 50.1 (2019)

A collection of poems by Abraham ibn Ezra, a key scholar, thinker, and poet in twelfth-century Al-Andalus

This volume offers the first critical edition, with English translation and commentary, of seven astrological treatises by Abraham Ibn Ezra: the Book of Elections (3 versions); the Book of Interrogations (3 versions); and the Book of the Luminaries.

As a result of Abraham Ibn Ezra’s increasing popularity after his death, there were repeated waves of translation of collections of his Hebrew astrological treatises into Latin and into the emerging European vernaculars. A study of these versions affords us a golden opportunity to shed light on a significant missing link in our knowledge of Ibn Ezra’s astrological oeuvre. The present volume offers the first critical edition, accompanied by an English translation, a commentary, and an introductory study, of three Latin texts on the astrological doctrines of elections and interrogations, written by or attributed to Abraham Ibn Ezra: the Liber electionum, the Liber interrogationum, and the Tractatus particulares.