in the form of a change of the elements into the body and blood, is preserved, while the question of the mode of this change, whether transubstantiation or otherwise, is left open, and all discussions of this mode are rejected. The next step in Luther’s discussion of the problem of transubstantiation is the famous passage in “De Captivitate,” which we have already mentioned. Looking back on his theological studies he describes his surprise when he came across some comments on the doctrine of transubstantiation