The concept of the World of Old Days goes, "Heaven and Earth coexist with me, and all things are one with me." The self is all things, and all things are the self.
If the butterfly that Zhuang Zhou dreamed of died, would Zhuang Zhou be unwilling to wake up? If the butterfly dreaming of Zhuang Zhou died, where did this dream come from?
The butterfly might have wondered—within a certain "possibility," is it "Zhuang Zhou"? Or are the thousands upon thousands of "butterflies" similar to it, having dreamed of a similar "Zhuang Zhou"?
When lying in bed, have you ever thought about the idea of "another version of me in a parallel world"? Have you ever deeply thought about "if I did xx, I would become xxx"? Have you ever longed for concepts like "the kindest me," "the most evil me," "the wealthiest me," "the me with the best drawing skills"?
