The Bible has great stories; one of my favorite stories is in 2 Samuel 9. David has ascended to the throne of Israel and as he does so, he asks a question in verse 3 of this chapter: "Is there anyone remaining of the house of Saul to whom I may show the kindness of God?"
The interesting this about this is that Saul was so spiteful and mean and hateful to David. But that did not matter to David; he knew that God has been kind to him and he wanted to show to someone else the same kindness he had received.
We've all been hurt, disappointed, treated badly by others and wounded in relationships. Yet today will be a different day if each of us attempts to show the same kindness to others - even to those who have done us wrong - that God has shown to us.
Try it and let us know what happens.