There was once a comedian who appeared before an audience. He told an elaborate and humorous story that made a whole theater laugh uproariously. His audience applauded him and begged for more.
So, he told the same joke again. This time perhaps just half of the people laughed or giggled, nervously.
Undaunted, the comedian told the story again. This time he was greeted with catcalls and consternation.
He told it again and again until no one laughed and some people began to leave.
When he was asked why he told the same joke over and over again, he replied "Since you don't laugh at the same thing over and over again, why do you weep unceasingly for the same sorrow?"