A wise man Joke

A wise man once sat in the audience and cracked a joke..all of them laughed like crazy
After a moment he cracked the same joke again & a little less people laughed this time...

He cracked the same one again and no one laughed, Then he smiled and said "when you cant laugh on the same joke again and again they why do you keep crying over the same thing over and over again". Forget the past and MOVE ON.