Rabbi

A rabbi's authority rests fundamentally on learning rather than on a sacramental ordination conferring a distinct spiritual status: semicha, rabbinic ordination, certifies that its holder has mastered a defined body of Jewish legal and textual sources sufficient to render authoritative rulings on Jewish law, halakha, and to teach, rather than conferring any change in the rabbi's own spiritual standing as a Jew, since Judaism does not hold that ordination changes a person's relationship to God the way sacramental ordination is understood to in Catholic or Orthodox Christian theology. A rabbi's typical responsibilities, teaching, answering questions of Jewish law and practice, officiating at life-cycle events including weddings, funerals and conversions, and, in a congregational setting, delivering sermons and leading or overseeing worship, combine legal, educational and pastoral functions considerably more integrated than the separation between preaching and law commonly found in many Christian clerical roles.

Because rabbinic authority derives from demonstrated mastery of texts rather than from an unbroken sacramental succession, a rabbi's rulings carry weight in proportion to his or her recognized scholarship and standing among peers rather than through appeal to an official hierarchical rank alone, a structure that has historically allowed considerable diversity of legal opinion to coexist within Judaism without a single central authority empowered to resolve every dispute definitively.

Historically, semicha traced an unbroken chain of ordination understood to reach back to Moses himself, though the original form of that chain, requiring ordination in the Land of Israel by an already-ordained rabbi, lapsed in late antiquity, and the modern practice of rabbinic ordination developed as a somewhat different institution, conferred by an individual rabbi or a rabbinical seminary upon a student judged to have mastered the required body of law, rather than as a literal continuation of the ancient chain. The major modern movements, Orthodox, Conservative, Reform and Reconstructionist Judaism, each maintain their own seminaries and standards for ordination, differing considerably in their approach to Jewish law's binding authority and, correspondingly, in the specific curriculum and legal reasoning a candidate must demonstrate.

Women's ordination has followed a sharply divided path across the movements: Reform Judaism ordained its first woman rabbi, Sally Priesand, in 1972, followed by Reconstructionist and then Conservative Judaism, which began ordaining women in 1985 after extended internal debate, while Orthodox Judaism has not adopted women's rabbinic ordination as a mainstream practice, though a small number of Orthodox-affiliated institutions have in recent years begun ordaining women under alternative titles or more limited authorizations, a development that remains contested within Orthodoxy itself.