Never forget your identity, because the world will not forget it. With it, no one can hurt you with it. This passage was said to the little devil when I first saw the snow. I copied it down immediately after reading it, because it is also of guiding value to real life. My brother has his sword and I have my head. A good brain needs books just as a sword needs a grindstone. In this line, the little devil tells Snow White why he has been studying. In the following story, the little devil really set a good example.