More quotes by Mark Twain

"Don't go around saying the world owes you a living. The world owes you nothing. It was here first."
"Everything human is pathetic. The secret source of humor itself is not joy but sorrow. There is no humor in heaven."
"The easy confidence with which I know another man's religion is folly teaches me to suspect that my own is also."
"Never put off till tomorrow what may be done day after tomorrow just as well."
"Humor is mankind's greatest blessing."