“The secret source of humor is not joy but sorrow; there is no humor in heaven.”

“Everything human is pathetic. The secret source of humor itself is not joy, but sorrow. There is no humor in Heaven.”

“The source of all humor is not laughter, but sorrow.”

“Humor is mankind's greatest blessing.”

“Humor is tragedy plus time.”

“Explaining humor is a lot like dissecting a frog, you learn a lot in the process, but in the end you kill it.”

“There are many humorous things in the world; among them, the white man's notion that he is less savage than the other savages.”