A joke played by Einstein's father and Uncle Jack.

One morning when Einstein was 0/6 years old, his father told him a story.

Einstein's father said, "Uncle Jack and I, our neighbors, are going to clean a big chimney in the southern factory. The chimney can only go up if you step on the steel ladder inside. Your uncle Jack is in the front and I am in the back. Civilization grasped the handrail and finally climbed the first step. When I came down, your uncle Jack was still in front and I was still behind him. Later, we went out of the chimney and found a strange thing: your uncle Jack's back and face were blackened by the soot from the chimney; And I don't have any soot on me. "

Einstein's father continued to smile and said, "I saw your uncle Jack and thought I must be dirty like a clown, so I went to the nearby river to wash and wash." And your uncle Jack, seeing me clean when I came out of the chimney, thought he was as clean as me, so he washed his hands and went out on the street in a big way. As a result, everyone in the street laughed and hurt their stomachs. They think your uncle Jack is crazy. "

Einstein couldn't help laughing with his father. When his father finished laughing, he solemnly said to him, "In fact, no one else can be your mirror. Taking others as a mirror, an idiot may also turn himself into a genius. "

Know yourself.