Do not try to punish others when they wrong you, but wait for God to punish them with his anger. Romans 12:19
Have you ever noticed in the western movies how the bounty hunter travels alone? It's not hard to see why. Who wants to hang out with a guy who settles scores for a living? Who wants to risk getting on his bad side? More than once I've heard a person spew his anger. He thought I was listening, when really I was thinking, I hope I never get on his list. Cantankerous sorts, these bounty hunters. Best leave them alone. Hang out with the angry and you might catch a stray bullet. Debt-settling is a lonely occupation. It's also an unhealthy occupation…
If you're out to settle the score, you'll never rest. How can you? For one thing, your enemy may never pay up. As much as you think you deserve an apology, your debtor may not agree. The racist may never repent. The chauvinist may never change. As justified as you are in your quest for vengeance, you may never get a penny's worth of justice. And if you do, will it be enough?
The Great House of God (Max Lucado)