If the peasants are in open rebellion, then they are outside the law of God. Therefore let all who are able slash, strike down, and kill (those who rebel) openly and secretly, remembering that there can be nothing more venomous, harmful, or devilish than a rebel. It is exactly like killing a mad dog.
Martin LutherLet all your preaching be in the most simple and plainest manner; look not to the prince, but to the plain, simple, gross, unlearned people, of which cloth the prince also himself is made. If I, in my preaching, should have regard to Philip Melancthon and other learned doctors, then should I do but little good. I preach in the simplest manner to the unskillful, and that giveth content to all. Hebrew, Greek and Latin I spare until we learned ones come together.
Martin LutherThe Deceiver can magnify a little sin for the purpose of causing one to worry, torture, and kill oneself with it. This is why a Christian should learn not to let anyone easily create an evil conscience in him. Rather let him say, "This error and this failing pass away with my other imperfections and sins, which I must include in the article of faith: I believe in the forgiveness of sins.
Martin LutherThe devil and temptations also do give occasion unto us somewhat to learn and understand the Scriptures, by experience and practice. Without trials and temptations we should never understand anything thereof; no, not although we diligently read and heard the same.
Martin Luther