All sympathetic association of Erasmus with the Reformers now ceased, though Melanchthon tried to stay the final rupture. One after another, the leaders of the religious anti-Roman movement withdrew from the famous humanist, especially Zwingli and Œcolampadius. This same year Erasmus resolved at last to heed the many appeals made to him, especially by Adrian VI and Henry VIII, to write against Luther. For the first time he took a decided stand, moved, no doubt, by the fear of losing the confidence of both parties. He chose with skill the point on which he would attack Luther. Erasmus had complained much earlier that the new religious movement begat only commotion, moral disorganization, and the interruption, if not the complete ruin, of learned studies. These abuses he traced to Luther’s denial of free will. He wrote, therefore, in defence of the freedom on the will, an attack on Luther, entitled: “Diatribe de libero arbitrio” (1524). The work, it may be said, was couched in a calm and dignified style. Though by no means sufficiently profound in its theological reasoning, the proofs are drawn with skill from the Bible and from reason. Luther’s reply was the “De servo arbitrio” (1524), henceforth the official programme of the new movement. Starting from the third chapter of the Epistle to the Romans, it teaches the absolute incompetency of man in his fallen state to perform moral acts; no franker antithesis to the humanistic ideal could be imagined. Erasmus replied in a work entitled “Hyperaspistes” (1526), but without effect. Luther ignored this reply, except in private letters in which he showed much irritation. Some years later, however, when the “Explanatio Symboli” of Erasmus appeared (1533), Luther attacked him once more in a public letter, to which Erasmus replied in his “Adversus calumniosissimam epistolam Martini Lutheri”. These passages at arms brought on Erasmus the violent hatred of the Wittenberg reformer, who now called him nothing but a sceptic and an Epicurean. Catholics, however, considered that Erasmus had somewhat rehabilitated himself, although the more extreme still disbelieved in him. He had not ceased to insist on the need of reforms, though he now spoke more composedly of many matters, such as celibacy. In his later years, it may be said, he held aloof from all religious conflicts, devoted to his humanistic studies and to an intimate circle of such friends as Boniface Amerbach, Beatus Rhenanus, and Glareanus. Nor was he indifferent to contemporary efforts at conciliation; he was in favour of ecclesiastical reunion. Meantime, the Reformation made rapid progress in Basle, where it took the form, greatly detested by Erasmus, of a violent destruction of images. He removed, therefore (1529), to Freiburg in the Breisgau, not far from Basle, in which city he could still find congenial Catholic surroundings. He did not relax his efforts for religious peace, in favour of which he exerted all his influence, especially at the imperial court. He also wrote, at the request of Melanchthon and Julius von Pflug, his “De sarciendâ Ecclesiæ concordiâ” (1533), in which he advocates the removal of ecclesiastical abuses in concord with Rome and without any changes in the ecclesiastical constitution. Notwithstanding his rupture with Luther, an intense distrust of Erasmus was still widespread; as late as 1527 the Paris Sorbonne censured thirty-two of his propositions. It is a remarkable fact that the attitude of the popes towards Erasmus was never inimical; on the contrary, they exhibited at all times the most complete confidence in him.