Why did Zhuangzi say that he knew the joy of fish?

Because Zhuangzi thinks that the pleasure of fish is actually the projection and externalization of his happy mood. Zhuangzi himself is happy, so he thinks fish are happy, too. It shows that Zhuangzi's attitude towards life is free and easy. "The son who is not a fish knows the joy of fish" is a sentence written by Keiko and recorded in Zhuangzi Qiushui. Don't always look at others with your own eyes, and it means "don't do to others what you don't want others to do to you".

Original text:

Zhuangzi and Keiko play together on Hao's bridge. Zhuangzi said: "It is a pleasure for small fish to wander around." Keiko said, "You are not a fish. How can you know that fish are happy?" ? Zhuangzi said, "You are not me. How do you know that I don't know that fish are happy?" " ? " Keiko said: "I am not a son, I really don't know my son;" Children are not fish, children don't know the happiness of fish, everything! " Zhuangzi said, "Please follow its source. Confucius said, "You know a lot about fish." He asked me because he knew what I knew. I know it very well. "

The whole article consists of two parts. The first part describes the dialogue between Poseidon and the river god in Beihai, which is the main part of this paper. Six fables are written in the second half, each of which is self-contained and unrelated, and has no structural connection with the dialogue between Poseidon and the river god in the previous part, which is of little help to the expression of the whole theme and appears detached.