I've posted this before, but it's worth posting it again:
None of us could live with an habitual truth-teller; but thank goodness none of us has to. An habitual truth-teller is simply an impossible creature; he does not exist; he never has existed. Of course there are people who think they never lie, but it is not so—and this ignorance is one of the very things that shame our so-called civilization. Everybody lies—every day; every hour; awake; asleep; in his dreams; in his joy; in his mourning; if he keeps his tongue still, his hands, his feet, his eyes, his attitude, will convey deception—and purposely. Even in sermons—but that is a platitude.
None of us could live with an habitual truth-teller; but thank goodness none of us has to. An habitual truth-teller is simply an impossible creature; he does not exist; he never has existed. Of course there are people who think they never lie, but it is not so—and this ignorance is one of the very things that shame our so-called civilization. Everybody lies—every day; every hour; awake; asleep; in his dreams; in his joy; in his mourning; if he keeps his tongue still, his hands, his feet, his eyes, his attitude, will convey deception—and purposely. Even in sermons—but that is a platitude.
ON THE DECAY OF THE ART OF LYING, by Mark Twain http://www.gutenberg.org/cache/epub/2572/pg2572.html