But if the theses of Luther were mighty in virtue of the truth which they proclaimed, they were not less so through the faith of their declared defender. He had boldly unsheathed the sword of the Word, and he had done it trusting to the power of truth. He had felt, that in leaning on the promises of God he could, in the language of the world, afford to risk something. Speaking of this bold attack, he says, "Let him who would begin a good enterprise undertake it, trusting to its own merits, and not (of this let him beware) to the help and countenance of man. Moreover, let not men, nor even the whole world, deter him. For these words will never deceive:—'It is good to trust in the Lord; and none that trust in him shall be confounded.' But let him who neither is able nor willing to hazard something through trust in God, beware of undertaking any thing."[362] Doubtless, Luther, after putting up his theses on the door of the church of All Saints, retired to his tranquil cell, in full possession of the peace and joy imparted by an action done in the name of the Lord, and for the sake of eternal truth.

These theses, notwithstanding of their great boldness, still bespeak the monk, who refuses to allow a single doubt as to the authority of the See of Rome. But in attacking the doctrine of indulgences, Luther had, without perceiving it, assailed several errors, the exposure of which could not be agreeable to the pope, seeing that they tended, sooner or later, to bring his supremacy in question. Luther, at the time, did not see so far; but he felt all the boldness of the step which he had just taken, and, consequently, thought himself bound to temper it in so far as was consistent with the respect due to truth. He, accordingly, presented his theses only as doubtful propositions on which he was anxious for the views of the learned; and, conformably to the established custom, annexed to them a solemn protestation, declaring that he wished not to say or affirm any thing not founded on Holy Scripture, the Fathers of the Church, and the rights and decretals of the See of Rome.

Often, in the sequel, on contemplating the immense and unlooked-for consequences of this courageous attack, Luther was astonished at himself, and could not understand how he had ventured upon it. An invisible hand, mightier than his own, held the leading reins, and pushed him into a path which he knew not, and from the difficulties of which he would, perhaps, have recoiled, if he had known them, and been advancing alone and of himself. "I engaged in this dispute," says he, "without premeditated purpose, without knowing it or wishing it; and was taken quite unprepared. For the truth of this I appeal to the Searcher of hearts."[363]

Luther had become acquainted with the source of these abuses. He had received a little book, ornamented with the arms of the Archbishop of Mentz and Magdeburg, and containing the regulations to be observed in the sale of indulgences. It was this young prelate, therefore, this accomplished prince, who had prescribed, or at least sanctioned, all this quackery. In him Luther only sees a superior to whom he owes fear and reverence;[364] and wishing not to beat the air, but to address those entrusted with the government of the Church, he sends him a letter, distinguished at once by its frankness and humility. Luther wrote this letter to Albert the same day on which he put up his theses.

"Pardon me, most reverend Father in Christ, and most illustrious Prince," says he to him, "if I, who am only the dregs of mankind,[365] have the presumption to write your High Mightiness. The Lord Jesus is my witness, that, feeling how small and despicable I am, I have long put off doing it.... Will your Highness, however, be pleased to let fall a look on a grain of dust, and, in accordance with your episcopal meekness, graciously receive my petition.

"There are people who are carrying the papal indulgence up and down the country in the name of your Grace. I do not so much blame the declamation of the preachers, (I have not heard them,) as the erroneous ideas of unlearned and simple people, who imagine that by buying indulgences they secure their salvation....

"Good God! souls entrusted to your care, most venerable Father, are conducted to death, and not to life. The just and strict account which will be required of you grows and augments from day to day.... I have not been able to continue longer silent. Ah! man is not saved by works, or by the performances of his bishop.... Even the righteous scarcely is saved; and the way that leadeth unto life is strait. Why, then, do the preachers of indulgences by vain fables inspire the people with a false security?

"According to them, indulgence alone ought to be proclaimed, ought to be extolled.... What! Is it not the chief and only duty of bishops to instruct the people in the gospel and the love of Jesus Christ?[366] Jesus Christ has nowhere ordered the preaching of indulgence; but has strongly enjoined the preaching of the gospel.[367] How dreadful, then and how perilous, for a bishop to allow the gospel to be passed in silence, and nothing but the sound of indulgence to be incessantly dunned into the ears of his people....

"Most worthy Father in God, in the Instruction of the commissaries, which has been published in name of your Grace, (doubtless without your knowledge,) it is said that the indulgence is the most precious treasure,—that it reconciles man to God, and enables those who purchase it to dispense with repentance.

"What then, can I, what ought I to do, most venerable Bishop, most serene Prince? Ah! I supplicate your Highness, by the Lord Jesus Christ, to turn upon this business an eye of paternal vigilance, to suppress the pamphlet entirely, and ordain preachers to deliver a different sort of discourses to the people. If you decline to do so, be assured you will one day hear some voice raised in refutation of these preachers, to the great dishonour of your most serene Highness."