Kitāb al-ḥudūd

Of his philosophical writings, Kitāb al-ḥudūd (Hebrew: Sefer ha-gevulim, “The Book of Definitions”) is best known. Beginning with a discussion of Aristotle’s four types of inquiry, Israeli goes on to present 56 definitions, including definitions of wisdom, intellect, soul, nature, reason, love, locomotion, and time. Others of his philosophical…