A preacher must be both soldier and shepherd. He must nourish, defend, and teach; he must have teeth in his mouth, and be able to bite and fight.
Martin LutherWhen one is possessed with doubt, that though he call upon the Lord he cannot be heard, and that God has turned him heart from him, and is angry ... he must arm himself with God's Word, promising to hear him.
Martin LutherIf any man doth ascribe of salvation, even the very least, to the free will of man, he knoweth nothing of grace, and he hath not learnt Jesus Christ aright.
Martin Luther