The first ingredient in conversation is truth, the next good sense, the third good humor, and the fourth wit.
Humor expands our limited picture frame and gets us to see more than just our problem.
HUMOR, EXPANDS OUR LIMITED PICTURE FRAME
In truth, politeness is artificial good humor, it covers the natural want of it, and ends by rendering habitual a substitute nearly equivalent to the real virtue.
HUMOR, POLITENESS IS ARTIFICIAL GOOD HUMOR