89. 子非鱼安知鱼之乐

Zhuangzi and Huizi roamed the bridge over Hao River.
Observing the fish in the river, Zhuangzi said to Huizi, "The fish are swimming leisurely and cosily; how happy they are!"
At that, Huizi asked at once, "You're not a fish and how can you tell they are happy?"
Zhuangzi retorted immediately: "You are not me and how can you tell I don't know they're happy?"
Huizi argued, "Yes, I'm not you, and nor I can tell; you are not a fish, and you don't either. That's all."
Zhuangzi urged, "Please get back to your original question; you asked 'How can you tell the fish are happy?', which indicates

that you knew I knew. I knew it on the bridge of Hao River."

庄子与惠子游于濠梁之上。
庄子曰：“儵鱼出游从容，是鱼之乐也。”
惠子曰：“子非鱼，安知鱼之乐？”
庄子曰：“子非我，安知我不知鱼之乐？”
惠子曰：“我非子，固不知之矣；子固非鱼也，子之不知鱼之乐，全矣。”
庄子曰：“请循其本。子曰‘汝安知鱼之乐’云者，既已知吾知之而问我，我知之濠上也。”