I read this today. It was written by Michael Josephson from the 2009 Josephson Institute of Ethics. It is pretty powerful!
"There are six truths about trust that must be understood and dealt with.
First, there is no shortcut to building trust. Rebuilding it on the rubble of lost credibility is much harder. The antidote is nothing less than scrupulous and consistent honesty—especially when the truth is costly.
Second, where trust is important, there are no small lies. Falsehoods, however small they seem, are like germs. Without the antibody of trust, they cause infections that can kill credibility.
Third, the lethal quality of lies lasts long after they're told. Lies told years ago have an immediate poisonous effect on trust when they're discovered. Think of all the prominent people who've been undone by the discovery of trumped-up old resumes.
Fourth, while honesty and forthrightness don't always pay, dishonesty and concealment always cost. It's true that in some settings nothing good may come of admitting wrongdoing, but it gets a lot worse when you don't.
Fifth, lies breed other lies. It's harder to tell just one lie than to have just one potato chip. Once you start deceiving, it takes more and more bodyguards of new lies to protect the old ones.
Finally, don't be seduced by the "I'm just fighting fire with fire" excuse or all you'll end up with is the ashes of your integrity. Self-justifications aside, you can't lie to a liar or cheat a cheater without becoming a liar or a cheater."