What is your favorite and unforgettable poem or word, and why?

Thank you for inviting me to answer. One of the poems that impressed me the most was Fan Zhongan's poem "Book Model Showing the Master" in the Song Dynasty:

Beautiful scenery of green hills.

The former fields were harvested by later generations;

Future generations should not be happy to accept it,

There are people behind.

This poem describes the impermanence of personnel in just 28 words, and advises people to treat money, which has nothing to do with themselves, correctly, instead of being stubborn. Fantasy can be kept forever, which can only increase pain and trouble. This poem still has thought-provoking practical significance today.