From: Zhuangzi's Autumn Water in Zhuangzi [Mid-Warring States Period].

Keiko said, "If you are not a fish, you will know the happiness of fish." Zhuangzi said, "You are not me. How do you know that I don't know that fish are happy?" ? "Keiko said," I'm not a child, so I know nothing about it; "Zi Gu is not a fish, but he doesn't know the joy of fish."

Interpretation: Keiko said, "If you are not a fish, how do you know the happiness of the fish?" Zhuangzi said, "If you are not me, how do you know that I don't know the happiness of fish?" Keiko said, "I'm not you, and I don't know you." You are not a fish in the first place, and you certainly don't know the happiness of fish. "

Extended data:

"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".

Autumn Water is another long story in Zhuangzi. The first two words are titled, and the center is to discuss how people should know foreign things.

Emphasize the complexity of understanding things, that is, the relativity of things themselves and the variability of cognitive processes, and point out the difficulty of cognition and accurate judgment. However, the article overemphasizes the uncertain factors of things, fails to reveal the dialectical relationship between relativity and absoluteness in the process of cognition, and easily leads to agnosticism, so it can only adapt to things and return to inaction, which is of course negative.