is widely recognized as a key document of modern existential thought and a significant contribution to Jewish theology in the twentieth century. An affirmation of what Rosenzweig called “the new thinking,” the work ensconces common sense in the place of abstract, conceptual philosophizing and posits the validity of the concrete, individual human being over that of “humanity” in general. Fusing philosophy and theology, it assigns both Judaism and Christianity distinct but equally important roles in the spiritual structure of the world, and finds in both biblical religions approaches toward a comprehension of reality.