When someone shows you their true colors, never try to paint a different picture. Many of us like giving others the benefit of the doubt. We see the glass as half full. We're optimists by nature rather than cynics. We like to see the best in people even in the face of evidence to the contrary. Unfortunately, having such a romantic view of human nature doesn't always pay off. Looking at someone through rose-colored glasses even when they've shown themselves to be unreliable, dishonest, manipulative, or opportunistic, can come back to bite us in a bad way. We've all been in situations where people -- friends, relatives, significant others -- have wronged us. We accept what we construe as their heartfelt apology and forgive them, steadfast in our belief that they won't do it again. Then, they do it again. And again. And again. I can't help but repeat that trite expression you've likely heard a million times by now: "Fool me once -- shame o...