Luther certainly teaches, even at the outset, as we shall point out later, that the will of man, by Adam’s Fall, has lost in our ruined nature even the power to work anything that is good or pleasing to God, and therefore that it is impossible for man, in his own strength, to withstand sin and its lusts. But he does not bring forward this doctrine under circumstances and in words which give us to understand that he was guided by the intention of showing any indulgence to concupiscence; on the contrary, he would like to encourage everyone to oppose concupiscence by means of grace and faith. Numerous texts might be quoted which clearly show this to have been the case. In what sense then does he allow the irresistibility of concupiscence? We shall find the answer in what follows. He frequently expresses the truth, taught by faith and experience alike, regarding the continuance of concupiscence in man, even in the most perfect, and he does so in terms so strong that he seems to make concupiscence invincible. We can also see that he has a lively sense of the burden of concupiscence, that he cherishes a certain gloomy distrust of God’s readiness to come to man’s assistance—a distrust connected with his temptations on predestination—and that he undervalues the helps which the Church offers against evil desires. Finally, he sees in the very existence of concupiscence a culpable offence against the Almighty, and declares that, without grace, man is an unhappy prisoner, who in consequence of original sin is in the fullest sense incapable of doing what is good. In his Commentary on the Psalms (1512-15-16) he still, it is true, upholds the natural freedom of man as opposed to his passions. In the Commentary on the Epistle to the Romans (1515-16), and frequently in the sermons of that period, he indeed sacrifices this freedom, but even there he insists that the grace of God will in the end secure the victory to those who seek aid and pray humbly, and he also instances some of the means which, with the efficacious assistance of God, may help to victory in the religious life. To this later standpoint of the possibility of resistance with the assistance of grace he adhered to his end. Exhortations to struggle not only against actual sins, but also against the smouldering fire of concupiscence—which must be extinguished more and more in the righteous until at length death sets him free—occupy many pages of his writings. The jarring notes present in the above teaching do not seem to have troubled him at any time; he seeks to conceal them and to pass them over. Never once does he enter upon a real theological discussion of the most difficult point of all, the relation of grace to free will.