An old man has a wife. A hard headed wife, who always does many things that, hurts him in many ways. And every single time he was hurt, he will hammer a nail into the wooden wall of his house. Until one day, the wall is full of nail.
After a time, the wife realized she was wrong and decided to repent on her sin towards her husband. So the husband pull out the nail on the wall one by one until none is left. The wooden wall of the house is now full holes.
Wall = Heart
Act of pulling out = Forgiveness
Hole = Scar