A wise man gets up in front of an audience and tells a really funny joke.
A moment later the man tells the exact same joke.
This time, less people laugh.
He then proceeds to tell the joke a third time.
There is hardly a chuckle.
He tells it again and again, until there is no more laughter in the crowd.
Then he smiles and says:
“You can’t laugh at the same joke again and again,
So why do you keep crying about the same thing over and over again?”