One day in class, the teacher asked the students, “What happens to a person after studying?” Everyone was silent, but one student jokingly said, “Sir, people make mistakes after studying!” The teacher was surprised and asked, “What kind of thing is that?” The student laughed and said, “Because we make mistakes while studying, and we learn from those mistakes.” The whole class laughed. The teacher also smiled and said, “There is logic in what you say.” There is a big lesson hidden in this incident—making mistakes is not bad, but rather people learn and improve from mistakes. Therefore, the real purpose of studying is not just knowing the right answer, but learning from mistakes.