“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.”
“Joy was not the raw material of humor . . . The dark source was sorrow.”
“The source of all humor is not laughter, but sorrow.”
“The secret to humor is surprise.”
“Humor and paradox are often the only ways to respond to life's sorrow with grace.”