A person's life is long and short. Live every day well, even if he is 20 years old, it will be long. If he lives all his life, he will feel short when he is 90 years old. You must stay stupid in this life. Only by staying stupid can you know how to learn to improve. People who always think they are smart are most likely to fall into their own strange circle of thinking, and always feel that they are extremely smart and have no progress, while those who think they are stupid will make progress from stupidity.

You should remain stupid, but you can't know how stupid you are. There are too many people smarter than you, and people are more popular than others. In order not to get angry, confusion is wonderful.