For five decades prior to his death in 1993, Rabbi Joseph Dov Soloveitchik was the unchallenged leader of modern Orthodox Judaism in the United States. His understanding of both traditional Judaism and secular philosophy shaped two generations of rabbinic students at Yeshiva University, and charted a new course for American Orthodox Jews. In On Repentance, noted scholar Pinchas Peli has gathered the major points of Rabbi Soloveitchik's teachings on...