The work of Erasmus reached Wittenberg in September, 1524. Luther treated it with contempt and ostentatiously repudiated it. He wrote to Spalatin, on November 1, that it disgusted him; he had been able to read only two pages of it; it was tedious to him to reply to so unlearned a book by so learned a man.[745] All the same, he did write a lengthy and detailed answer; that he delayed doing so until late in the following year is to be accounted for by the Peasant-War with its terrors, which entirely engrossed his attention; it was also the year of his marriage. In estimating the value of the reply, upon which he then set to work with great energy, we must bear in mind the state of the author and the inward and outward experiences through which he had just gone. The impression made on his mind by the events of those days has left its stamp in the even more than usually extreme utterances contained in his reply to Erasmus. When once he had begun the work he carried it to its end with a rush; he himself admits that it was composed in excessive haste. We also know to whose influence his final decision to take the work in hand was due, viz. to Catherine Bora. “It was only at her request” that he undertook the work, when she pointed out to him, “that his foes might see in his obstinate silence an admission of defeat.”[746]

Luther’s Book “On the Enslaved Will” against Erasmus

The title “De servo arbitrio,” “On the enslaved will,” was borrowed by Luther from a misunderstood saying of St. Augustine’s.[747] While the book which bears it was still in the press his friend Jonas commenced a German version and entitled it: “Dass der freie Wille nichts sei.”[748]

However grotesque and exaggerated some of the principal theses of the famous work, Luther was at pains to declare therein that they were the result of most careful deliberation and were not written in the heat of controversy. Hence, as a Protestant historian says, “we must not seek to hide or explain them away, as was soon done by Luther’s followers and has been attempted even in our own day.”[749] Another Protestant scholar, in the preface to his study on the work “De servo arbitrio,” remarks that “quite rightly it caused great scandal and wonder,” and goes on to point out that “the hard, offensive theory” which it champions was “no mere result of haste or of annoyance with Erasmus, coupled with the desire clearly to define his own position with regard to the latter,” but really “expresses the matured conviction of the Reformer.”[750]

In this lengthy, badly arranged and rather confused work we see, first, that Luther gives the widest limits to his denial of free-will and declares man to be absolutely devoid of freedom of choice, even in the performance of works not connected with salvation, and moral acts generally. He does, indeed, casually remark that man is free “in inferioribus,” and that the question is whether he also possesses free-will in respect of God (“an erga Deum habeat liberum arbitrium”).[751] “But it is doubtful whether we are to take Luther at his word.” For “as a matter of fact he shows clearly enough that he does not wish this limitation to be taken literally.”[752] “That his intentions are, on the contrary, of the most radical character, is plain from many other passages where he attacks free-will everywhere, and represents all that we do and everything that occurs (‘omnia quæ facimus et omnia quæ fiunt’), as taking place in accordance with inexorable necessity.”[753] He lays it down as a principle that God’s omnipotence excludes all choice on man’s part, and again supports this on an argument from the Divine omniscience; God from all eternity sees all things, even the most insignificant, by virtue of His prescience, hence they must happen. Even where God acts on man apart from the influence of grace (“citra gratiam spiritus”), according to Luther, it is He Who works all in all, as the Apostle says, “even in the impious.” “All that He has made, He moves, impels and urges forward (‘movet, agit, rapit’) with the force of His omnipotence which none can escape or alter; all must yield compliance and obedience according to the nature of the power conferred on them by God.”[754]

In the same way as he here speaks of a certain “power” in the creature, so also, in the same connection, he refers to “our co-operation” in the universal action of God (“et nos ei cooperaremur”). By this, however, he does not mean any real free co-operation but, as he says darkly, only an activity of the will corresponding to its nature and governed by law, “whether in submission to the universal omnipotence of God in matters which do not refer to His Kingdom, or under the special impulse of His Spirit [grace] within His Kingdom.”

Luther’s main object in the book “De servo arbitrio” is undoubtedly the vindication of religious determinism.

His denial of free-will had its root in his mistaken conviction that man was entirely passive in the matter of his salvation and in his attempt to destroy all personal merit, even that won by the help of grace, as at variance with the merit of Jesus Christ. He is fond of dwelling with emphasis on the absence of any co-operation on man’s part in his justification, which is effected by faith alone, and on the so-called “righteousness” which had been effected in man by God alone even previous to man’s choice. Even that free-will for doing what is good, which is given back to the man who is justified, does not strictly co-operate—lest the merit of Christ should suffer.

“This, then, is what we assert: Man neither does nor attempts anything whatever in preparation for his regeneration by justification or for the Kingdom of the Spirit, nor does he afterwards do or attempt anything in order to remain in this Kingdom, but both are the work of the Spirit in us, Who, without any effort on our part, creates us anew and preserves us in this state.... It is He Who preaches through us, Who takes pity upon the needy and comforts the sorrowful. But what part is there here for free-will to play? What is left for it to do?—Nothing, absolutely nothing.”[755]

Here we have a renewal of the attack on his old bugbear, self-righteousness, his dislike of which leads him to universal determinism; from his mechanical doctrine of faith alone it was merely a step to this mechanical view of everything.