
“Humor is laughing at what you haven't got when you ought to have it.”
"A Note on Humor", from The Book of Negro Humor https://books.google.com/books?id=60FkAAAAMAAJ&focus=searchwithinvolume&q=%22Humor+is+laughing+at+what+you+haven%27t+got+when+you+ought+to+have+it.%22, p. vii (1966)