Rosenzweig drew heavily from the lectures of his teacher in modern Jewish philosophy, Hermann Cohen, to construct his own highly original revaluation of the thought of classical Judaism on the model of Judah Halevi's philosophy and poetry within the framework of the post-Hegelian, post-rationalist, German Romantic philosophy of the early twentieth century. Rosenzweig expressed his Jewish thought through many forms, including new German translations of the Hebrew Scriptures, essays on Jewish education, and his personalized administration of a nonaccredited school for Jewish studies at the University of Frankfurt. No Jewish theologian has had a more lasting impact on the subsequent development of Jewish philosophy than has Franz Rosenzweig. It is not an exaggeration to say that with very few exceptions every important Jewish religious thinker in the second half of the twentieth century was either his student or a student of his students in...