Once, when he wanted to replace an old painting on the wall, he brought a ladder and climbed it step by step. Suddenly, he remembered another question, started thinking, forgetting what he was doing, and suddenly fell off the ladder. After falling to the ground, he ignored the pain, and immediately thought: Why do people fall straight? It seems that the object always moves along the line of least resistance. Einstein stood up at the thought of this, limped to the table, and wrote down his thoughts. This has a lot of inspiration for the problem he is studying-the theory of relativity.

In 1930, Germany published a book criticizing the theory of relativity, entitled "A Hundred Professors Prove Einstein Wrong". After hearing the news, Einstein just shrugged and said: "100 people are too much. As long as I can prove that I am really wrong, even one person is enough."

Once, Einstein was walking on the streets of New York. His best friend met him. And said to him: "Einstein, you should buy a new dress. Look at how old your clothes are!" But Einstein replied, "It's okay, no one here knows me." A few years later , Einstein became a world-famous scientist, but he still wore that dress. The friend met him again and told him to buy a new dress. But Einstein said: "I don't need to buy new clothes. Everyone here knows me."