A just law is a man-made code that squares with the moral law or the law of God. An unjust law is a code that is out of harmony with the moral law. To put it in the terms of Saint Thomas Aquinas, an unjust law is a human law that is not rooted in eternal and natural law.
Martin LutherIf 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 LutherJews and papists are ungodly wretches; they are two stockings made of one piece of cloth.
Martin LutherThe devil is not only a liar, but also a murderer, he constantly seeks our life, and wreaks his anger whenever he can afflict our bodies with misfortune and harm. Hence it comes that he often breaks men's necks or drives them to insanity, drowns some, and incites many to commit suicide, and to many other terrible calamities. Therefore there is nothing for us to do upon earth but to pray against this arch enemy without ceasing. For unless God preserved us, we would not be safe from him even for an hour.
Martin Luther