"People have to drag their hair away from the earth" is just an illusory imagination, which can't be realized in reality, which shows that ideals should be based on reality.
"People should drag their hair away from the earth" is an irrefutable objective law, and we can draw the following conclusions: We should respect the objective law.
"People have to drag their hair away from the earth" means that people fail to know themselves correctly, so we can draw the following conclusions: (1) Face up to their shortcomings; People can't forget their roots; Don't bite off more than you can chew;
"People should drag their hair away from the earth" implies that the relationship between people and the earth is close, from which we can draw a conclusion that we should cherish the environment of the earth.
With the development of science and technology, people can leave the earth with advanced scientific and technological means. Based on this, we can draw the following conclusions: face up to reality and seek development; Develop yourself with the help of external forces; Go your own way.
We can draw the unchangeable fact that "people should drag their hair away from the earth": don't be whimsical, and be down-to-earth in their careers.
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