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

Suppose you were an idiot. And suppose you were a member of Congress. But I repeat myself.
– Mark Twain, a Biography

~hat tip to ro-bear