For where God built a church, there the Devil would also build a chapel.

The world says of marriage: A short joy and a long displeasure. But he who understands it finds in it delight, love, and joy without ceasing.

What shall we do with...the Jews?...set fire to their synagogues or schools and bury and cover with dirt whatever will not burn, so that no man will ever again see a stone or cinder of them.

Where faith is not continually kept in motion and exercised, it weakens and decreases, so that it must indeed vanish; and yet we do not see nor feel this weakness ourselves, except in times of need and temptation, when unbelief rages too strongly; and yet for that very reason faith must have temptations in which it may battle and grow.

In a mouse we admire God's creation and craft work. The same may be said about flies.

Those who lapse from the Gospel to the Law are no better off than those who lapse from grace to idolatry.

An earthly kingdom cannot exist without inequality of persons. Some must be free, some serfs, some rulers, some subjects.