In a second letter, written on the way to Wittenberg, Luther added: “I am ready to incur the displeasure of your highness and the anger of the whole world. Are not the Wittenbergers my sheep? Has not God entrusted them to me? And ought I not, if necessary, to expose myself to death for their sakes? Besides, I fear to see a terrible outbreak in Germany, by which God will punish our nation.”(272) With great caution and humility, yet with decision and firmness, he entered upon his work. “By the Word,” said he, “must we overthrow and destroy what has been set up by violence. I will not make use of force against the superstitious and unbelieving.... No one must be constrained. Liberty is the very essence of faith.”(273) It was soon noised through Wittenberg that Luther had returned, and that he was to preach. The people flocked from all directions, and the church was filled to overflowing. Ascending the pulpit, he with great wisdom and gentleness instructed, exhorted, and reproved. Touching the course of some who had resorted to violent measures in abolishing the mass, he said: “The mass is a bad thing; God is opposed to it; it ought to be abolished; and I would that throughout the whole world it were replaced by the supper of the gospel. But let no one be torn from it by force. We must leave the matter in God’s hands. His word must act, and not we. And why so? you will ask. Because I do not hold men’s hearts in my hand, as the potter holds the clay. We have a right to speak: we have _not_ the right to act. Let us preach; the rest belongs unto God. Were I to employ force, what should I gain? Grimace, formality, apings, human ordinances, and hypocrisy.... But there would be no sincerity of heart, nor faith, nor charity. Where these three are wanting, all is wanting, and I would not give a pear-stalk for such a result.... God does more by His word alone than you and I and all the world by our united strength. God lays hold upon the heart; and when the heart is taken, all is won.... “I will preach, discuss, and write; but I will constrain none, for faith is a voluntary act. See what I have done. I stood up against the pope, indulgences, and papists, but without violence or tumult. I put forward God’s word; I preached and wrote—this was all I did. And yet while I was asleep, ... the word that I had preached overthrew popery, so that neither prince nor emperor has done it so much harm. And yet I did nothing; the Word alone did all. If I had wished to appeal to force, the whole of Germany would perhaps have been deluged with blood. But what would have been the result? Ruin and desolation both to body and soul. I therefore kept quiet, and left the Word to run through the world alone.”(274) Day after day, for a whole week, Luther continued to preach to eager crowds. The word of God broke the spell of fanatical excitement. The power of the gospel brought back the misguided people into the way of truth.