ר׳ בחיי בן יוסף אבן פקודה

ר׳ בחיי בן יוסף אבן פקודה, commonly called ר׳ בחיי הדיין, was a Jewish moral philosopher, theologian and religious writer active in Zaragoza under Muslim rule. Almost nothing securely known about his personal life survives: no reliable source establishes his birth, death, family, teachers, journeys or the dates of his judicial service. His epithet הדיין supports the traditional description of him as a judge, and the historical tradition consistently associates his activity with Zaragoza. His importance rests on one extraordinary and securely attributed book, כתאב אלהדאיה אלא פראיץ׳ אלקלוב (The Guide to the Duties of the Hearts), written in Judaeo-Arabic and generally dated around 1080, though the dating remains debated. The work argues that visible commandments or 'duties of the limbs' are incomplete without inward duties: knowledge of divine unity, reflection on creation, sincere service, trust in God, purity of intention, humility, repentance, self-examination, disciplined detachment and love of God. Across ten ordered gates, ר׳ בחיי joins Scripture and rabbinic teaching to rational theology, Arabic ethical literature and the ascetic-mystical vocabulary shared with Muslim pietist and Sufi writers. Modern scholarship treats this as a creative Jewish synthesis rather than a simple borrowing: reason and revelation jointly lead the reader from divine unity toward transformed character and love. The book's concern with intention, psychological self-scrutiny and correspondence between inward conviction and outward action made it a foundational work of Jewish ethical and devotional literature. ר׳ יהודה בן שאול אבן תיבון translated it into Hebrew beginning in 1161 under the title חובות הלבבות; ר׳ יוסף קמחי also produced a medieval Hebrew translation, only part of which survives. The Ibn Tibbon version enabled centuries of study and strongly shaped later pietistic, kabbalistic, Musar and Hasidic reading. Because the evidence documents an intellectual life in Zaragoza rather than a recoverable itinerary, this record deliberately does not invent travel or precise life stages.