Luther had not spoken more forcibly against the abuses of Rome but he had done something more. The duke pointed out the evil, Luther had, along with the evil, pointed out both the cause and the cure. He had shown that the sinner receives the true indulgence, that which comes from God, solely by faith in the grace and merits of Jesus Christ, and this simple but powerful doctrine had overturned all the markets established by the priests. "How can one become pious?" asked he one day. "A Cordelier will reply, Put on a grey hood, and tie a cord round your waist. A Roman will reply, Hear mass, and fast. But a Christian will say, Faith in Christ alone justifies and saves. Before works we must have eternal life. After we are born anew, and made children of God by the word of grace, then it is we do good works."[428] [428] L. Op. (W.) xxii, 748-752. The duke spoke the language of a secular prince--Luther, the language of a reformer. The great sore of the Church was that she had devoted herself entirely to externals; had made all her works and her graces to consist of outward and material things. Indulgences had carried this to its extreme point, and pardon, the most spiritual thing in Christianity, had been purchased in shops like meat and drink. The great work of Luther consisted in his availing himself of this extreme point in the degeneracy of Christendom, in order to bring back the individual and the Church to the primitive source of life, and to re-establish the reign of the Holy Spirit within the sanctuary of the heart. Here, as often happens, the cure sprung out of the disease, and the two extremes met. Henceforward the Church, which during so many ages had been developed externally by ceremonies, observances, and human practices, began again to be developed within by faith, hope, and charity. [Sidenote: LIST OF GRIEVANCES.]