Oscar Wilde: "Even if you are in dirty ditches and sewers, you should look up at the stars." Hegel has a famous saying: "A nation can only have hope if it has some people who care about the sky;" A nation only cares about what is under its feet and has no future. " At the same time, he said, "only those who lie in the pit forever and never look up at the sky will not fall into the pit." There is also a saying that "frogs at the bottom of the well also have the right to look up at the stars."