“Humor is tragedy plus time.”

“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.”

“Humor is mankind's greatest blessing.”

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

“There has been much tragedy in my life; at least half of it actually happened.”

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