Lesson in life:
A wise man sat in the audience and cracked a joke. Everybody laughs like crazy. After a moment, he cracked the same joke again. This time, less people laughed. He cracked the same joke again and again. When there is no laughter in the crowd, he smiled and said: “You can’t laugh at the same joke again and again, but why do you keep crying over the same thing over and over again?