Speech by sales promotion master

A famous sales promotion master was invited to give a speech to say goodbye to his career.
The curtain opened slowly, and the stage was in the center, with a huge iron ball hanging on the iron frame. The two staff carried a hammer and put it in front of an old man. The host invited two strong people to come to the stage. The old man said, "Please use this hammer to beat the hanging iron ball until you swing it up ."
A young man grabbed a sledgehammer and threw all his power at the iron ball. The ball was not moving with a sound of shock. He then gritted the ball with a hammer, but the ball remained unchanged. Soon he panted. Another person took the iron hammer and jingled the ball, but the iron ball was still motionless. The audience seemed to think it was useless and waited for the old man to explain it.
The venue recovered. The old man took out a hammer from his coat pocket, knocked on the iron ball, paused, and knocked again. 10 minutes later, 20 minutes later, and the conference room began to stir up. Some people shouted and shouted out their dissatisfaction.
The old man does not care, just a hammer to stop working. Some people began to leave suddenly, and the people who stayed seemed tired. The venue gradually calmed down.
About 40 minutes after the old man went on, a woman sitting in front of him suddenly shouted, "the ball is moving !" I saw the ball moving with a very small degree of swing, and then the old man hammer the higher the swing, it pulled the iron shelf "squeaking", shocked everyone present.
Finally, there was a burst of applause. In the round of applause, the old man turned around and slowly put the hammer into his pocket.
The old man spoke. His farewell speech has only one sentence: "If you don't have the patience to wait for success, you have to face failure ."