  In a series of correspondences during the war, Rosenzweig also began to formulate those basic philosophical ideas that would govern his most important works. Here Rosenzweig articulated a critique of the philosophical tradition culminating in German Idealism, and along with it a positive vision of the direction philosophy and theology, in tandem, should take in his time. Rosenzweig would later understand these ideas as part of an intellectual project called the “new thinking” which he shared with his closest interlocutors, Eugen Rosenstock-Huessy, Rudolf Ehrenberg, Hans Ehrenberg, and Viktor von Weizsäcker, and whose core insights had also been reached by Martin Buber and Ferdinand Ebner. Drawing from Rosenzweig’s 1925 essay, “The New Thinking,” and taking into consideration Rosenzweig’s varied comments about the “new thinking” in other writings, one can highlight the key ways in which Rosenzweig understood this “new thinking” to differ from the “old thinking” of the philosophical tradition.