Chapter 7: The value of humility (paragraph 17)

The tenth step of humility teaches that we should not be given to empty laughter on every least occasion because: a fool's voice is for ever raised in laughter. (Para. 17 of Ch. 7 of Saint Benedict's Rule, trans. by Patrick Barry, OSB, 1997.)

The adjectives here are important: "empty" laughter, and "every least" occasion. There's nothing wrong with laughter, but like any other authentic expression I strive for, my laughter should be full of heart, integral with myself, and appropriate, mostly.