From Marc H. Tanenbaum, "Vatican II: An Interfaith Appraisal: A Jewish Viewpoint," in Judith H. Banki and Eugene J. Fisher, eds., A Prophet for Our Time: An Anthology of the Writings of Rabbi Marc H. Tanenbaum (New York: Fordham University Press, 2002).  A lecture originally delivered at the University of Notre Dame in March 1966.