People can make mistakes, but they can't make the same mistakes.

The best person is yourself.

The more you know, the less you know.

Ignorance is evil.

Adversity is the highest institution for human beings to acquire knowledge, and the difficult problem is the door for people to acquire wisdom.

Only by knowing yourself can we know life.

There are two kinds of people in this world, one is a happy pig and the other is a miserable person. Be a miserable person, not a happy pig.

Socrates' famous saying