If we cannot accept the importance of the world, which considers itself important, if in the midst of that world our laughter finds no echo, we have but one choice: to take the world as a whole and make it the object of our game; to turn it into a toy.
The childless experts on child raising also bring tears of laughter to my eyes when they say, "I love children because they're so honest." There is not an agent in the CIA or the KGB who knows how to conceal the theft of food, how to fake being asleep, or how to forge a parent's signature like a child.
(Bill Cosby (20th century), U.S. comedian. Fatherhood, ch. 5 (1986).)
... in the happy laughter of a theatre audience one can get the most immediate and numerically impressive guarantee that there is nothing in one's mind which is not familiar to the mass of persons living at the time.
(Rebecca West (1892-1983), British author. The Strange Necessity, ch. 12 (1928).)
You can forgive people who do not follow you through a philosophical disquisition; but to find your wife laughing when you had tears in your eyes, or staring when you were in a fit of laughter, would go some way towards a dissolution of the marriage.
(Robert Louis Stevenson (1850-1894), Scottish novelist, essayist, poet. Virginibus Puerisque, title essay, pt. 1 (1881).)