How Hard It Is

The glory which is built upon a lie soon becomes a most unpleasant encumbrance. ...  How easy it is to make people believe a lie, and how hard it is to undo that work again!

-- Mark Twain (1835 - 1910), American humorist, novelist, writer, and lecturer, autobiographical dictation, (2 December 1906).  Published in Autobiography of Mark Twain, Volume 2 (University of California Press, 2013)