I hope you will understand it.

A wise man sat in a audience and cracked a joke.
       Everybody laughs like crazy.

After a moment, he cracked a same joke again.
       This time, less people laughs.

He cracked the same joke again and again.
   When there is no laughter in the crowd.

        After within minutes, the man Said:
You can't laugh at the same joke again and again,
But why do you keep crying over the same thing
                                                
                                                    Over again and again?