In 1521 Luther is condemned as a heretic. Nevertheless, his theses spread rapidly throughout the Empire. They find resonance among the people as the Roman clergy are unable to give convincing answers to the spiritual questions of the faithful. The Roman clergy suggest recompensing bad actions with good actions. Luther, on the other hand, represents the opinion that only faith in God can save our souls and that divine mercy is far superior to the efforts of people to do penance.The Council of Trent (1545-1563) reaffirms the Catholic theological tenet that salvation can be found through good works and with the help of the sacraments and the intercession of the saints. However, the conflict has already extended to the political arena. In 1555 the Peace of Augsburg puts an end for the time being to religious wars in Germany. However, it is also a sign of the failure of Charles V and his brother Ferdinand who attempted to reconcile all of Christendom under the power of the ruler. The Peace of Augsburg introduces the political principle of "Cujus regio, ejus religio." That means: The right of princes and cities to choose freely between Catholic or Lutheran faith is directly dependent on the Empire.