analysis:

1. People can't step into the same river twice. The sun is new every day.-[Ancient Greece] Heraclitus

Meaning: The whole universe is in the process of continuous passing and continuous movement, and there is always a new world, things are born, and the old world is dying. That is to say, movement is absolute. What makes one kind of people superior to another is knowledge.-[Germany] Schopenhauer

Meaning: The power of knowledge is enormous, and it can sublimate people's thoughts and spirits from the inside.

3. Being old and being old, and being old; Young people are young, as well as young people.-Mencius

Meaning: people should love others from loving their families.