Forgiveness: there is an expiry date...

I have someone in mind when I read this:

Forgiveness
The preacher, in his Sunday sermon, used "Forgive Your Enemies" as his subject.
After a long sermon, he asked how many were willing to forgive their enemies.
About half held up their hands.
Not satisfied, he harangued for another twenty minutes and repeated his question.
This time he received a response of eighty percent.
Still unsatisfied, he lectured for fifteen minutes and repeated his question.
With thoughts of Sunday dinner, all responded except one old gentleman in the rear.
Mr. Jones, are you not willing to forgive your enemies?"
"I don't have any."
"Mr. Jones, that is very unusual. How old are you?"
"Eighty-six."
"Mr. Jones, please come down in front and tell the congregation how a man can live to be 86 and not have an enemy in the world."
The old man teetered down the aisle and slowly turned around. "It's easy. I outlived all of them...."

I am also reminded of this quote:
Am I not destroying my enemies when I make friends of them? - Abraham Lincoln
Link