Someone asked Luther, "Do you feel that you've been forgiven?" He answered, "No, but I'm as sure As there's a God in Heaven!"

Where the battle rages, there the loyalty of the soldier is proved; and to be steady on all the battlefield besides, is mere flight and disgrace if he flinches at that point.

Look to it that you do not try to do all of it, do not try to do too much, lest your spirit grow weary. Besides, a good prayer mustn't be too long. Do not draw it out. Prayer ought to be frequent and fervent.

Not only the words (vocabula) which the Holy Spirit and Scripture use are divine, but also the phrasing

Let a man be endowed with ten virtues and have but one fault and the one fault will eclipse and darken all the virtues.

One learns more of Christ in being married and rearing children than in several lifetimes spent in study in a monastery.

A large number of deaf, crippled and blind people are afflicted solely through the malice of the demon. And one must in no wise doubt that plagues, fevers and every sort of evil come from him.