All the reformers aimed at freeing themselves from oppressive rule at Rome, and endeavored to establish a purer faith. The appeal to private judgment as against unquestioning belief was a natural result of the revival of learning as well as of spiritual quickening.
Before Luther's time, however, such revolts against church authority had been quickly suppressed. It is also true that many abuses had been done away by reformation within the Church itself; and that, indeed, was what Luther at first intended. His movement became "too powerful to be put down, and its leaders soon passed beyond the point at which they were willing to reform the Church from within. Finding that the Church would not respond as quickly and as fully to their demands as they wished, they left the Church and attacked it from without." In Germany the administration of the Church had long caused discontent. Through Martin Luther this feeling found powerful utterance, and in him the demand for reforms became irresistibly urgent.
Luther, the son of a poor miner, was born at Eisleben, Saxony, November 10, 1483. He became an Augustinian monk, in 1507 was consecrated a priest, and the next year was made professor of philosophy in the University of Wittenberg. In 1511 he visited Rome, and on his return to Wittenberg was made doctor of theology. He had already become known through the power and independence of his preaching. Although he went to Rome "an insane papist," as he said, and while he was still intensely devoted to the Church and its leaders, he made known his belief in what became the fundamental doctrines of Protestantism, exclusive authority of the Bible--implying the right of private judgment--and justification by faith.
The immediate occasion of Luther's first great protest was the sale of indulgences by the Dominican monk John Tetzel. From early times the church authorities had granted indulgences or remissions of penances imposed on persons guilty of mortal sins, the condition being true penitence. At length the Church began to accept money, not in lieu of penitence, but of the customary penances which usually accompanied it. Before 1517 Luther had given warnings against the abuse of indulgences, without blaming the administration of the Church. But when in that year Tetzel approached the borders of Saxony selling indulgences in the name of the Pope, Leo X, who wanted money for the building of St. Peter's Church in Rome, Luther, with many of the better minds of Germany, was greatly offended by the vender's methods. Against the course of Tetzel Luther took a firm stand, and when the reformer posted his theses (summarized by Koestlin) on the church door at Wittenberg the first great movement of the Reformation in the sixteenth century was inaugurated.