Why cry when you think of old things

A wise man is asked to say something at a ceremony. He got up on stage and said a joke. The audience burst into laughter. A little later he said the same joke again. This time a few people smiled. He then repeated the same joke several times. But no one laughed at it. He laughed a little and said to everyone, you can't laugh a few times about the same thing, then why do you cry again and again thinking the same thing ??? Even if we cry about what has happened, it cannot be changed. Crying is not the solution to any problem. Even if we cry, the problem becomes more complicated. In all cases, it is wise to accept the reality.