Said by: Zhuangzi's On the Homology of Things, Zhuangzi during the Warring States Period.
The original text is: The dream of former Zhuang Zhou is Hu Die, and Hu Die is vivid, which is a metaphor for historical records without knowing Zhou Ye. If you suddenly feel it, you will suddenly feel it. I wonder if Zhou's dream is a dream or a dream is Zhou He? Zhou he, there are still points. This is called materialization.
In the past, Zhuang Zhou dreamed that he had become a butterfly, a very vivid butterfly. How happy and comfortable he feels! I didn't know I was Zhuang Zhou. I suddenly woke up and realized that I was Zhuang Zhou. I wonder if Zhuang Zhou became a butterfly in his dream, or if the butterfly became Zhuang Zhou in his dream? There must be a difference between Zhuang Zhou and Butterfly. This can be called crop, my interaction and change.
Extended data:
The meaning of Zhuang Zhou Mengdie:
With romantic imagination and wonderful writing style, Zhuangzi described and discussed become a butterfly in his dream and become a butterfly after waking up, and put forward the view that it is impossible for people to accurately distinguish between truth and illusion and the materialization of life and death. Here, Zhuangzi raised a philosophical question-how people know the truth. If dreams are real enough, people have no ability to know that they are dreaming.
In the eyes of ordinary people, what a person sees and feels when he is awake is real, and dreams are hallucinations and unreal. Zhuangzi doesn't think so. Although, waking is a realm, dreams are another realm, and the two are different; Zhuang Zhou is Zhuang Zhou, and butterflies are butterflies. They are different, too. In Zhuang Zhou's view, they are just a phenomenon, a form and a stage in the Tao movement.
Zhuangzi is using a simplest fable to illustrate one of the heaviest problems of mankind, that is, the problem of life and death.
Baidu Encyclopedia-Zhuang (China Idiom)