That it may not so fare with us and our noble young Emperor Charles, we must be sure that in this matter we are dealing not with men, but with the princes of hell, who can fill the world with war and bloodshed, but whom war and bloodshed do not overcome. We must go at this work despairing of physical force and humbly trusting God; we must seek God's help with earnest prayer, and fix our minds on nothing else than the misery and distress of suffering Christendom, without regard to the deserts of evil men. Otherwise we may start the game with great prospect of success, but when we get well into it the evil spirits will stir up such confusion that the whole world will swim in blood, and yet nothing will come of it. Let us act wisely, therefore, and in the fear of God. The more force we use, the greater our disaster if we do not act humbly and in God's fear. The popes and the Romans have hitherto been, able, by the devil's help, to set kings at odds with one another, and they may well be able to do it again, if we proceed by our own might and cunning, without God's help. I. THE THREE WALLS OF THE ROMANISTS [Sidenote: The Three Walls Described] The Romanists[12], with great adroitness, have built three walls about them, behind which they have hitherto defended themselves in such wise that no one has been able to reform them; and this has been the cause of terrible corruption throughout all Christendom. _First_, when pressed by the temporal power, they have made decrees and said that the temporal power has no jurisdiction over them, but, on the other hand, that the spiritual is above the temporal power. _Second_, when the attempt is made to reprove them out of the Scriptures, they raise the objection that the interpretation of the Scriptures belongs to no one except the pope. Third, if threatened with a council, they answer with the fable that no one can call a council but the pope.