“If we wish to stand upon the councils and counsels of men, we lose the Scriptures altogether and remain in the devil’s possession body and soul. He is Satan, and Satan is his name, i.e. an adversary. He must obstruct and cause misfortune; he cannot do otherwise. Moreover, he is the prince and god of this world, so that he has sufficient power to do so. Since he is able and determined to do all this, we must not imagine that we shall have peace from him. He takes no vacation and he does not sleep. Choose, then, whether you prefer to wrestle with the devil or whether you prefer to belong to him. If you consent to be his, you will receive his guarantee to leave you in peace with the Scriptures. If you refuse to be his, defend yourself, go at him! He will not pass you by; he will create such dissension and sectarianism over the Scriptures that you will not know where Scriptures, faith, Christ, and you yourself stand.
Woe betide all our teachers and authors, who go their merry way and spew forth whatever is uppermost in their minds, and do not first turn a thought over ten times to be sure it is right in the sight of God! These think the devil is away for a while in Babylon, or asleep at their side like a dog on a cushion. They do not consider that he is round about them with all his venomous flaming darts which he puts into them, such superlatively beautiful thoughts adorned with Scripture that they are unaware of what is happening. Here no admonition, no warnings, no threats are of any avail. The devil is master of a thousand arts. If God does not defend and help us, all our actions and counsels are nothing. No matter which way you look at it, the devil is the prince of this world. He who does not know this, let him try and see. I have had some experience in this matter. But no one will believe me until he experiences it also” (Luther’s Works, vol. 37, p.17-18).