claims to be a comprehensive discussion of the place of reason in Luther’s theology. After the present writer had already completed his manuscript, he received a copy of Bernhard Lohse’s admirable work, Ratio und Fides. Eine Untersuchung über die ratio in der Theologie Luthers (Göttingen, 1958), the most comprehensive and satisfactory treatment of the problem that has yet appeared. Had this study been available to me during my own research, I would certainly have made extensive use of it: in revising