Laugh More and Cry Less

A wise man once sat in the audience and cracked a joke. All laughed like crazy. After a moment he cracked the same joke again and a little less people laughed this time.
He cracked the same joke again & again, when there was no laughter in the crowd, he smiled and said “When you can't laugh at the same joke again & again, then why do you keep crying over the same thing over and over again.”