The theoretical weakness of Luther’s attack on free-will and its manifest bias in his own religious psychology caused the theologian O. Scheel to exclaim regretfully: “Luther impressed a deterministic stamp on the fundamental religious ideas which he put before the world.” Luther’s determinism was vainly repudiated as a “reformed heresy” by the later Protestants. It is true that Luther based his predestinarian sayings on his “personal experience of salvation, which he felt to have been a free gift,” but then his “religious state was not normal,” as Kattenbusch already had “rightly pointed out.” Luther’s doctrine of the distinction between the “_Deus absconditus_” and the “_Deus revelatus_” Scheel ascribes to a false conception of God,[833] though he is inclined to look with favour on Luther’s fatalism, finding therein “nothing irreligious,” but merely Luther’s lively “trust in God”; he even speaks of the “religious power and truth inherent in this idea.”[834] Under another aspect the work exhibits, better than any other, the undeniable qualities of its writer, the elasticity of his mind, his humour and imagination, and his startling readiness to turn every circumstance to advantage; at the same time, undoubtedly because it was a case of breaking a lance with Erasmus, the style is more polished than usual and the language less abusive. The editor of the Weimar edition speaks of the book as the “most brilliant of Luther’s Latin polemics, nay, perhaps the most brilliant of all his controversial works.”[835] Luther would not have committed this great work to writing had not his mind been full of the subject. How far calm deliberation had any place in the matter it is as hard to determine here, as it is in so many of his other productions, where feeling seems to hold the reins. It is likewise difficult to understand how Luther, in practice, managed to compromise with the ideas he expounds, more especially as he was the leader of a movement on the banner of which was inscribed, not the gloomy domination of fatalism, but the amelioration of religious conditions by means of moral effort in all directions. The contradiction between lack of freedom on the one hand, and practice and the general belief in free-will on the other, was a rock which he circumnavigated daily, thanks to his self-persuasion that the strands drawn by the Divine Omnipotence around the will were of such a nature as not to be perceptible and could therefore be ignored. We believe ourselves to be free, and do not feel any constraint because we surrender ourselves willingly to be guided to the right or to the left; this, however, is merely due to the exceptional fineness of the threads which set the machine in motion.