There are many famous lines in Chinese classical poetry that express the meaning of self-improvement. Please give an example and explain its meaning.

1. Live as a hero, and die as a ghost. ——Li Qingzhao

Explanation: When you are alive, you must be a hero among men, and when you die, you must be a hero among ghosts. It has nothing to do with utilitarianism, just to give an explanation for life.

2. Heaven is moving vigorously, and a gentleman strives to constantly strive for self-improvement. ——"Book of Changes"

Interpretation: It means that the universe is constantly moving, and people should follow the example of heaven and earth and move forward forever.

3. How can a sparrow know the ambition of a swan? ——"Historical Records. "The Chen She Family"

Explanation: It is a metaphor for how ordinary people know the ambitions of heroes.