If you want to be rich, you must control yourself! If you want to be wealthy, you must learn to control yourself. But most people can't control themselves, which is why many people never have money in their lifetime. I'll share a few principles for self-control. First, focus only on work in your mind; only concentrate on work, and cut off friends and relatives unrelated to your work. Second, develop a habit of reading—read whenever you're bored and cultivate the habit of reading.