The disorders which sprang up in the progress of the Reformation recalled Luther to Wittenberg. He felt that his presence was necessary to restrain Carlstadt and others, and, defying any danger to which he might still be exposed, he returned in 1522 to the old scene of his labors, rebuked the unruly spirits who had acquired power in his absence, and resumed with renewed energy his interrupted work. He strove to arrest the excesses of the Zwickau fanatics, and counselled peace and order to the inflamed peasants; while he warned the princes and nobles of the unchristian cruelty of many of their doings, which had driven the people to exasperation and frenzy. At no period of his life is he greater than now, in the stand which he made against lawlessness on the one hand and tyranny on the other. He vindicated his claim to be a reformer in the highest sense by the wise and manly part which he acted in this great social crisis in the history of Germany. In this year also he published his acrimonious reply to Henry VIII. on the seven sacraments. Although he had been at first united in a common cause with Erasmus, estrangement had gradually sprung up between the scholar of Rotterdam and the enthusiastic reformer of Wittenberg. This estrangement came to an open breach in the year 1525, when Erasmus published his treatise "De Libero Arbitrio." Luther immediately followed with his counter-treatise "De Servo Arbitrio." The controversy raged loudly between them; and in the vehemence of his hostility to the doctrine of Erasmus, Luther was led into various assertions of a very questionable kind, besides indulging in the wild abuse of his opponent's character. The quarrel was an unhappy one on both sides; and it must be confessed there is especially a want of generosity in the manner in which Luther continued to cherish the dislike which sprang out of it. In the course of the same year Luther married Katharina von Bora, one of nine nuns who, under the influence of his teaching, had emancipated themselves from their religious vows. The step rejoiced his enemies and even alarmed some of his friends, like Melancthon. But it greatly contributed to his happiness, while it served to enrich and strengthen his character. All the most interesting and touching glimpses we get of him henceforth are in connection with his wife and children.