There is a story: Aristotle in ancient Greece believed that the speed of falling objects is different, and the speed of falling objects is directly proportional to their weight. The heavier the object, the faster it falls. For example, an object with 10 kg falls 1 0 times faster than an object with1kg. 1700 for more than 700 years, people have always regarded this theory that violates the laws of nature as an indisputable truth. Young Galileo boldly questioned Aristotle's theory based on his own empirical reasoning. After careful consideration, he decided to do an experiment by himself. He chose the Leaning Tower of Pisa as the experimental field. On this day, he brought two iron balls with the same size but different weights, one of which weighed 100 Jin and was solid; One is 1 kg, hollow. Galileo stood on the leaning tower of Pisa and looked under it. There are people standing under the tower to watch, and everyone is talking about it. Someone sarcastically said, "This young man must be crazy! Aristotle's theory is not wrong! " The experiment began. Galileo took an iron ball in each hand and shouted, "Look clearly, people below, the iron ball is going to fall!" " "Say that finish, he opened his hands at the same time. People were dumbfounded when they saw two iron balls falling in parallel and landing almost at the same time. Galileo's experiment revealed the secret of falling body movement and overthrew Aristotle's theory. In life, books and authority are not always correct. Actually, nothing is right. We can't blindly trust people or things. In fact, books and authority are the oars that help us when we sail to the other side of success. They can only use it, not rely on it. Books and authority are the halls of our success step by step, and the food that helps us stop being hungry. We can only use them, but we can't rely on them. We should stick to our own truth and don't trust books and authority. Believe in yourself rather than books and authority.