In the proofs, the text of which is still extant and was probably printed together with the theses, we read other statements which remove all doubt as to the seriousness of the propositions put forth: “Righteousness is infused by faith, for we read: ‘the just man liveth by faith’ (Rom. i. 17) ... not as though the just man did not perform any works, but because his works are not the cause of righteousness, but righteousness is the cause of the works. Grace and faith are infused without any work on our part, and then the works follow.”[833]

Luther in one passage of these “proofs” addresses to himself the only too-well-founded objection: “Therefore we will be content without virtue as we on our part are able only to sin!”[834] But instead of solving this objection in a proper form, he answers rhetorically: “No, fall on your knees and implore grace, put your hope in Christ in Whom is salvation, life and resurrection. Fear and wrath are wrought by the law, but hope and mercy by grace.”[835]

Underlying the whole Disputation, we perceive that antagonism to the fear of God as the Judge of transgressions against the law, which the reader has before remarked in Luther; that fear which Catholic teaching had hitherto represented as the beginning of conversion and justification.

Utterances drawn from that mysticism into which he had plunged and the language of which he had at that time made his own, are also noticeable. He speaks at the Disputation of the annihilation through which a man must pass in order to arrive at the certainty of salvation (a road which is assuredly only for the few, whereas all stand in need of certainty): “Whoever is not destroyed and brought back to nothingness by the cross and suffering, attributes to himself works and wisdom. But whoever has passed through this annihilation does not pursue works, but leaves God to work and to do all in him; it is the same to him whether he performs works or not; he is not proud of himself when he does anything, nor despondent when God does not work in him.”[836] He then proceeds, describing the absolute passivity of his mysticism as the foundation of the process of salvation: “He [who is to be justified] knows that it is enough for him to suffer and be destroyed by the cross in order to be yet more annihilated. This is what Christ meant when He said (John iii. 7): ‘Ye must be born again.’ If Christ speaks of ‘being born again,’ it necessarily follows that we must first die, i.e. feel death as though it were present.”

Besides the antagonism to true and well-grounded fear, and the mystical veneer, there is a third psychological element which must be pointed out in the Heidelberg Theses, viz. the uncalled-for emphasis laid on the strength of concupiscence and man’s inclination to what is evil, and the insufficient appreciation of the means of grace which lead to victory. This view of the domination of evil, which must ultimately be favourable to libertinism, accompanies the theoretical expression and the practical realisation of his system.

In the Heidelberg Disputation we find in the proof of thesis 13, already referred to: “It is clear as day that free will in man, after Adam’s Fall, is merely a name and therefore no free will at all, at least as regards the choice of good; for it is a captive, and the servant of sin; not as though it did not exist, but because it is not free except for what is evil.”[837] This Luther pretends to find in Holy Scripture (John viii. 34, 36), in two passages of St. Augustine “and in countless other places.” He undertakes to prove this in a special note, by the fact that, according to the teaching of the Fathers of the Church, man is unable during life to avoid all faults, that he must fall without the assistance of grace, and that, according to 2 Timothy ii. 26, he is held captive by the “snares of the devil.” “The wicked man sins,” he says, “when he does what is good.” “The righteous man also sins in his good works,” according to the words of the Apostle: “But I see another law in my members fighting against the law of my mind” (Rom. vii. 23). God works everything in us; but just as the carpenter, however capable he may be, cannot work properly with a jagged axe, so, in spite of God’s work, sin still remains, owing to the imperfection of the tool He makes use of, i.e. on account of the sinfulness which permeates us.[838]

“The mercy of God consists in this, that He has patience with us in spite of our sins and graciously accepts our works and our life notwithstanding their complete worthlessness.... We escape His Judgment through His mercy [to which we cling through faith alone], not by our own righteousness.... God excuses our works and makes them pardonable; He supplies what is wanting in us, and thus He is our righteousness.”[839]

“How is it possible that a ‘servant of sin’ should do anything else but sin? How can a man perform a work of light when he is in darkness, a work of wisdom when he is a fool, the work of a whole man when he is lying there sick, etc.? Therefore all that a man does is the work of the devil, of sin, of darkness and foolishness.” “Why do we say that concupiscence is irresistible? Well, just try to do what you can, but without concupiscence! Of course, this is impossible. Thus your nature does not keep the law. If you do not keep this, then still less can you keep the law of charity.”[840]

The crown of all this is found in certain propositions from another of Luther’s Disputations (the fourth) held at Wittenberg in 1518, of which the eminently characteristic title is: “For the ascertaining of the Truth and for the Quieting of anxious Consciences.” Here we find this exhortation: “Cast yourself with a certain despair of your own self, more particularly on account of the sins of which you are ignorant, with confidence into the abyss of the mercy of God, Who is true to His promises. The sum total is this: The Just man shall live by faith, not, however, by works or by the law.”[841] Such is the theology which he calls the “Theology of the Cross.”[842] The Church, with a past of fifteen centuries behind her, also taught that the just man must live by faith, but by this she meant a real faith which leads to the love of the cross, which expresses itself in submission, in salutary fear, in a striving after what is good and which bears in itself the seeds of charity. She thus exhorted the faithful to penance, the practice of good works and a practical embracing of the cross. That was her “Theology of the Cross.”

The three more important Disputations considered above were designated by Luther himself as the “beginning of the evangelical business.” He gave the title Initium negocii evangelici to a collection of the theses debated at these Disputations which appeared in print at Wittenberg in 1538.[843] It is significant that the theses against Tetzel and on Indulgences have no place in this collection of the earliest “evangelical” documents.