The second influence that decided and deepened Zwingli's life was that of Luther. He first mentions him in 1519, and from that time forth, often. All his works and all his acts thereafter show the impress of the Wittenberg professor. Though Zwingli himself sturdily asserted that he preached the gospel before he heard of Luther, and that he learned his whole doctrine direct from the Bible, he deceived himself, as many men do, in over-estimating his own originality. He was truly able to say that he had formulated some {152} of his ideas, in dependence on Erasmus, before he heard of the Saxon; and he still retained his capacity for private judgment afterwards. He never followed any man slavishly, and in some respects he was more radical than Luther; nevertheless it is true that he was deeply indebted to the great German. Significantly enough, the first real conflict broke out at Zurich early in 1520. Zwingli preached against fasting and monasticism, and put forward the thesis that the gospel alone should be the rule of faith and practice. He succeeded in carrying through a practical reform of the cathedral chapter, but was obliged to compromise on fasting. Soon afterwards Zurich renounced obedience to the bishop. The Forest Cantons, already jealous of the prosperity of the cities, endeavored to intervene, but were warned by Zwingli not to appeal to war, as it was an unchristian thing. Opposition only drove his reforming zeal to further efforts. In the spring of 1522 Zwingli formed with Anna Reinhard Meyer a union which he kept secret for two years, when he married her in church. In the marriage itself, though it was by no means unhappy, there was something lacking of fine feeling and of perfect love. [Sidenote: Reformation in Zurich]