The secret source of humor is not joy but sorrow there is no humor in Heaven.
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About Mark Twain
Mark Twain was a 19th-century American author and humorist. Samuel Langhorne Clemens, known by the pen name Mark Twain, was an American writer, humorist, and essayist. He was praised as the "greatest humorist the United States has produced", with William Faulkner calling him "the father of American literature". Read more on Wikipedia →