Here’s a good
article by Fr. James Martin, S.J., on the humor of St. Teresa of Avila. Also, here’s one quote from the great Doctor of the Church:
“A sad nun is a bad nun,” she said. “I am more afraid of one unhappy sister than a crowd of evil spirits….What would happen if we hid what little sense of humor we had? Let each of us humbly use this to cheer others.”
And one of my favorite quotes that’s attributed to her (though, it’s not actually found in any of her known writings), I actually made into a
meme.
As for what the Catechism says about laughter, though, I’m only familiar with
paragraph 1856, where it states:
"…But when the sinner’s will is set upon something that of its nature involves a disorder, but is not opposed to the love of God and neighbor, such as thoughtless chatter or immoderate laughter and the like, such sins are venial."
Fr. Charles Grondin, one of the CAF apologists here, says
this about “immoderate laughter”:
"The theological phrase “immoderate laughter” might be better understood through the culture term schadenfreude, which is generally defined as:
*Finding humor in something that causes another person pain (physical or emotional) would be wrong. Another element of this would be being amused by inappropriate “jokes” (i.e. racist, sexist, etc).
Its not that laughter, in and of itself, is wrong. Its that what is causing us to laugh is an attitude that is contrary to the virtue of charity. "*