More quotes by Mark Twain

"The secret source of humor is not joy but sorrow; there is no humor in Heaven."
"Some people get an education without going to college. The rest get it after they get out."
"All you need in this life is ignorance and confidence; then success is sure."
"Life would be infinitely happier if we could only be born at the age of eighty and gradually approach eighteen."
"The secret to getting ahead is getting started."