Luther became increasingly fearful that the situation was out of hand and that he would be in danger. To placate his opponents, he published a Sermon on Indulgences and Grace, which did not challenge the pope’s authority. This pamphlet, written in German, was very short and easy for laypeople to understand. Luther’s first widely successful work, it was reprinted twenty times. Tetzel responded with a point-by-point refutation, citing heavily from the Bible and important theologians. His pamphlet was not nearly as popular as Luther’s. Luther’s reply to Tetzel’s pamphlet, on the other hand, was another publishing success for Luther.
Another prominent opponent of the Theses was Johann Eck, Luther’s friend and a theologian at the University of Ingolstadt. Eck wrote a refutation, intended for the Bishop of Eichstätt, entitled the Obelisks. This was in reference to the obelisks used to mark heretical passages in texts in the Middle Ages.
It was a harsh and unexpected personal attack, charging Luther with heresy and stupidity. Luther responded privately with the Asterisks, titled after the asterisk marks then used to highlight important texts. Luther’s response was angry and he expressed the opinion that Eck did not understand the matter on which he wrote. The dispute between Luther and Eck would become public in the 1519 Leipzig Debate.
Luther was summoned by authority of the pope to defend himself against charges of heresy before Thomas Cajetan at Augsburg in October 1518. Cajetan did not allow Luther to argue with him over his alleged heresies, but he did identify two points of controversy. The first was against the 58th thesis, which stated that the pope could not use the treasury of merit to forgive temporal punishment of sin.
This contradicted the papal bull Unigenitus promulgated by Clement VI in 1343. The second point was whether one could be assured that one had been forgiven when one’s sin had been absolved by a priest. Luther’s Explanations on thesis seven asserted that one could based on God’s promise, but Cajetan argued that the humble Christian should never presume to be certain of their standing before God. Luther refused to recant and requested that the case be reviewed by university theologians. This request was denied, so Luther appealed to the pope before leaving Augsburg. Luther was finally excommunicated in 1521 after he burned the papal bull threatening him to recant or face excommunication.
Legacy
The indulgence controversy set off by the Theses was the beginning of the Reformation, a schism in the Roman Catholic Church which initiated profound and lasting social and political change in Europe. Luther later stated that the issue of indulgences was insignificant relative to controversies which he would enter into later, such as his debate with Erasmus over the bondage of the will, nor did he see the controversy as important to his intellectual breakthrough regarding the gospel.
Luther later wrote that at the time that he wrote the Theses, he remained a “papist”, and he did not seem to think the Theses represented a break with established Roman Catholic doctrine. But it was out of the indulgences controversy that the movement which would be called the Reformation began, and the controversy propelled Luther to the leadership position he would hold in that movement.
The Theses also made evident that Luther believed the church was not preaching properly and that this put the laity in serious danger. Further, the Theses contradicted the decree of Pope Clement VI, in 1343, that indulgences are the treasury of the church. This disregard for papal authority presaged later conflicts.
31 October 1517, the day Luther sent the Theses to Albert, was commemorated as the beginning of the Reformation as early as 1527, when Luther and his friends raised a glass of beer to commemorate the “trampling out of indulgences”. The posting of the Theses was established in the historiography of the Reformation as the beginning of the movement by Philip Melanchthon in his 1548 Historia de vita et actis Lutheri.
During the 1617 Reformation Jubilee, the centenary of 31 October was celebrated by a procession to the Wittenberg Church where Luther was believed to have posted the Theses. An engraving was made showing Luther writing the Theses on the door of the church with a gigantic quill. The quill penetrates the head of a lion symbolizing Pope Leo X. In 1668, 31 October was made Reformation Day, an annual holiday in Electoral Saxony, which spread to other Lutheran lands. 31 October 2017, the 500th Anniversary of Reformation Day, was celebrated with a national public holiday throughout Germany.