While most of us try to be truthful, we all lie on occasion. Some lies are minor (“Of course you don’t look fat in that outfit!”) and many are the “white lies” of everyday discourse (“This is the one product you cannot live without.”) In most cases, these lies do not cause harm and do not brand the liar as generally untrustworthy. But once you lie to someone about a matter of importance, you have damaged your relationship with that person in a way that is not easily mended.