I thoroughly disapprove of duels. I consider them unwise and I know they are dangerous. Also, sinful. If a man should challenge me now I would go to that man and take him kindly and forgivingly by the hand and lead him to a quiet retired spot and kill him.

In revised edition, Vol. I, "Friday, January 19, 1906, About Dueling.", p. 298, The Autobiography of Mark Twain, 1959, Charles Neider, Harper & Row. - Mark Twain's Autobiography (1924)