There is a famous saying that he wanted to change the world when he was very young before he died. As a result, he found that the world could not be changed, and the last thing he could change was himself. In the tombstone forest in the basement of Westminster Abbey, England, there is a world-famous unknown tombstone with this epitaph:

When I was young, my imagination was never limited and I dreamed of changing the world.

When I grow up, I find that I can't change the world. I shortened my horizons and decided to change only my country.

When I get old, I find that I can't change my country. My last wish is just to change my family. However, this is also impossible.

When I was lying in bed dying, I suddenly realized that if I just changed myself at first, then I might follow the example of changing my family; With the help and encouragement of my family, I may do something for my country. And then who knows? I can even change the world.