The intelligent Zhang Zi and the clever Hui Zi were strolling on the bridge over the Haoshui River.

Zhuang Zi said, "The fish is swimming freely and unhurriedly in the water. What a pleasure!"

Hui Zi said, "You are not the fish. How could you know that the fish is joyous?"

Zhuang zi said, "You are not me, and how could you know that I can't tell whether the fish is joyous or not?"

Hui Zi said, "No, I am not you and do not know what you are thinking about . But you are not fish. So you cannot know whether the fish is joyous or not. This is for sure."

Zhuang Zi said, "When you said 'How could you know that the fish was joyous.' So I know the fish is joyous, and I know this on the Haoshui River."

智慧的庄子和聪明的惠子在濠水的桥上游玩。

庄子说：“鯈鱼从容自在地在水中游玩，这真是鱼的快乐呀！”

惠子说：“你又不是鱼，你怎么会知道它是否快乐呢？”

庄子说：“你又不是鱼，你怎么会知道我不懂得鱼的快乐呢？”

惠子说：“我的确不是你，却是不知道你在想什么，你并不是鱼，因此，你不知道鱼是否快乐，这是完全可以肯定的了。”

庄子说：“你说‘你怎么会知道鱼的快乐呢’的时候，表面你已经肯定了我知道鱼的快乐。所以我是知道鱼快乐的，我是在濠水之上知道鱼快乐的呀！”