On the Decay of the Art of Lying is a short essay by Mark Twain from 1885. In it he deplores that way man's "most faithful friend" is being used and indeed misused, declaring that "the wise thing is for us diligently to train ourselves to lie thoughtfully, judiciously; to lie with a good object, and not an evil one; to lie for others' advantage, and not our own; to lie healingly, charitably, humanely, not cruelly, hurtfully, maliciously; to lie gracefully and...