It is said that Thales, an ancient Greek philosopher, saw the stars one night and predicted that it would rain tomorrow, but he accidentally fell into the pit at his feet. When someone rescued him, he told the other party the prophecy. Thales' prediction has become a joke, and philosophers have become synonymous with "only paying attention to the sky and ignoring reality". Two thousand years later, Hegel vindicated the philosopher with his words of "looking up at the sky". He even said: "Only those who lie in the pit forever and never look up at the sky will not fall into the pit."

Hegel said: A nation has hope only if it has those who care about the sky. If a nation only cares about what is at its feet, it has no future.