In Edison's childhood, people were as interested in electricity as we are in space travel now. Edison, who was interested in everything, became interested in telegrams. In order to earn money to study his favorite telegraph, Edison finally became a newsboy on the train after bargaining with his mother. Edison was a boy of medium height when he started selling food on the train. Although Edison is not particular about clothes, people like his appearance. He is forgetful, because although he is sometimes with others, his mind is always thinking about how to do something new. When he is talking to others or playing games, his brain is often busy thinking about other things. His business income is considerable, and he can spare one yuan every day to supplement his mother's family. The rest is used to buy books and enrich experimental supplies except for eating. Over time, he never squandered a penny again. The train will stop in Detroit for six hours. Every day, the train will enter Detroit station. Edison quickly arranged the affairs and rushed to the reading room of the Youth Federation to read. Whenever Edison sat quietly reading a book in the library, his mother's words rang in his ears: "Newton and Watt were not excellent students at school, but they didn't lose heart. They continued to work hard and finally invented something useful to mankind. So as long as you study hard, mom believes you can invent things. " As he goes to the library every day, he becomes familiar with the librarians. One day, the manager asked him how many books he had read, and Edison said? Quot I have finished reading two books on the first shelf. "The manager couldn't help laughing at this, and then said seriously," I think the contents of these two books you have read successively are irrelevant! What is the purpose of your study? "Edison said," I read it in the order on the shelf. I want to read all the books here. "The librarian admired the young Edison's perseverance in reading, but earnestly advised him:" Your spirit is really admirable, but reading with a clear purpose, reading everything, will not have a good result. You should choose a goal in the future and read around it. "Edison was deeply inspired by the suggestions of managers, and he began to understand that learning should have a clear purpose. From then on, he studied harder and paid attention to his learning methods.