A real friend may upset you by telling you the truth, but he or she will tell you the truth nonetheless. They may not always tell you what you want to hear, but if they truly love you, they’ll tell you what you need to hear.
Some of the worst lies are the ones we tell ourselves, and end up believing. And another thought: a liar’s biggest problem is they can’t believe anybody else, because ‘how you live your life is how you judge your neighbour’.