A Butterfly

From the booklet that comes with RahXephon Orchestration 3:

One day about sunset, Zhuangi dozed off and dreamed that he turned into a butterfly. He flapped his wings and sure enough, he was a butterfly... What a joyful feeling as he fluttered about, he completly forgot that he was Zhuangi. Soon though, he realized that that proud butterfly was really Zhuangi who dreamed he was a butterfly, or was it a butterfly who dreamed he was Zhuangi! Maybe Zhuangi was the butterfly, and maybe the butterfly was Zhuangi?

"I Dreamt I Was A Butterfly"
Zhuang Zi