There once was a little boy who had a bad temper (anger). His Father gave him a bag of nails and told him that every time he lost his temper and get angry, he must hammer a nail into the back of the fence.
The first day the little boy had driven 37 nails into the fence. Over the next few weeks, as he learned to control his anger, the number of nails hammered daily gradually dwindled down.
Little boy discovered it was easier to hold his temper (anger) than to drive those nails into the fence...
Finally the day came when the little boy did not lose his temper (anger) at all. He told his father about it and the father suggested that the little boy now pull out one nail for each day that he was able to hold his temper (anger). The day passed and the little boy was finally able to tell his father that all the nails were gone.
The father took his little boy by the hand and led him to the fence. He said, "You have done well, my son, but look at the holes in the fence.
The fence will never be the same. When you say things in anger, they leave a scar just like this one. You can put a knife in a man and draw it out. It won't matter how many times you say I'm sorry, the wound is still there."