If the earth is fit for laughter then surely heaven is filled with it. Heaven is the birthplace of laughter.
Martin LutherWhenever the devil harasses you, seek the company of men or drink more, or joke and talk nonsense, or do some other merry thing. Sometimes we must drink more, sport, recreate ourselves, and even sin a little to spite the devil, so that we leave him no place for troubling our consciences with trifles. We are conquered if we try too conscientiously not to sin at all. So when the devil says to you: do not drink, answer him: I will drink, and right freely, just because you tell me not to.
Martin LutherTherefore, is thy brother a sinner? Then cover his sin and pray for him. Dost thou publish his sins, then truly thou art not a child of your merciful Father; for otherwise thou wouldst be also as he, merciful. It is certainly true that we cannot show as great mercy to our neighbor, as God has to us; but it is the true work of the devil that we do the very opposite of mercy, which is a sure sign that there is not a grain of mercy in us.
Martin Luther