A man must completely despair of himself in order to become fit to obtain the grace of Christ.

If you young fellows were wise, the devil couldn't do anything to you, but since you aren't wise, you need us who are old.

The multitude of books is a great evil. There is no limit to this fever for writing.

Music must be supported by the king and the princes, for the maintenance of the arts is their duty no less than the maintenance of the laws.

Medicine makes people ill, mathematics make them sad and theology makes them sinful.

He that has but one word of God before him, and out of that word cannot make a sermon, can never be a preacher.

Reason must be deluded, blinded, and destroyed. Faith must trample underfoot all reason, sense, and understanding, and whatever it sees must be put out of sight and ... know nothing but the word of God.