In the sermon he preached at Erfurt in 1522 in support of the change of religion in that town he had declared, that every Christian, thanks to his kingly priesthood, was an “image of Christ” and a “cleric,” and “able to judge of all things”; to his decision, based on the Word of Christ, “the Pope and all his followers were subject”; “he judges all things and is judged of none.”[804] Even two years later, in words proclaiming universal freedom of belief, he had dissuaded the Saxon Princes from taking violent measures against the fanatics: “Let the spirits fall upon each other and clash!” What cannot stand must in any case succumb in the fight, and only those who fight rightly are assured of the crown. “Just let them preach as they please!”[805] In 1525 he told Carlstadt and the Sacramentarians that each one was free to follow his own conscience and to question the Sacrament or refuse to receive it.[806] This agrees with his statement of 1521: “No one must be forced into the faith, but the Gospel must be set before everyone and all be admonished to believe, yet left free to obey or not. All the Sacraments must be free to everyone.”[807] Luther registered a formal protest against the ancient right of proceeding against heretics by means of temporal penalties, particularly that of death. “To burn heretics is against the will of the Holy Ghost,” so he declared in 1518 and again in 1520.[808] In 1520 he said: “Heretics must be overcome by argument, not by fire.”[809] Most of what he was to say subsequently on the question of public toleration refers to the bearing of the authorities, especially towards the Anabaptists and Zwinglians. That he himself, however, and every follower of his Evangel, were bound to regard all opinions which diverged from his own as godless heresies and brand them as such, that he had never doubted from the moment he had discovered his new Evangel. In accordance with this he proceeds to demand more and more strongly of the “heretics” within the pale unconditional acceptance of all the articles of faith.[810] What were the authorities to do faced by teachings so divergent? In 1523, in a writing indeed intended mainly for the Catholic rulers and opponents of his doctrine, Luther is decidedly quite against any interference on the part of the authorities: “To resist heretics, that is the bishops’ duty to whom this office is committed, not the princes’; for heresy can never be overborne by a strong hand.… Here God’s Word must fight.”[811] In April, 1525, in the midst of the Peasant War, in his “Ermanunge,” he enunciates, not without some thought of his personal ends, this general principle—“Yes, the authorities must not oppose what each one chooses to believe and teach, whether it be Gospel or lie; it is enough that they hinder the preaching of feud and lawlessness.”[812]