The Taoist classic featuring Zhuangzi’s butterfly dream is the Zhuangzi.
In the story, Zhuangzi dreams that he is a butterfly, enjoying its existence without knowing he is Zhuangzi. When he wakes, he asks whether he was a man dreaming of being a butterfly or a butterfly dreaming of being a man. The passage explores uncertainty about fixed identity and the boundary between waking and dreaming.
The story does not provide a simple answer. Its force comes from unsettling assumptions about how confidently people can distinguish perspectives and states of being. This approach is characteristic of the Zhuangzi, which uses playful stories rather than only formal arguments.
The Zhuangzi contains 33 chapters in the received version and is traditionally associated with Zhuang Zhou, an early Taoist thinker. The Tao Te Ching is another foundational Taoist classic, but it does not contain the famous butterfly episode.