Good joke

A wise man once sat in the audience & 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 u can't laugh on the same joke again & again, then why do u keep crying over the same thing over and over again”