if you dream: you are a butterfly 
fluttering across the sky.
would you be very surprised 
if you wake up and realize

All your former human life
will disappear? Open your eyes.
You've always been a butterfly
fluttering across the sky.

Zhuang Tzu once had a dream, as if he was a butterfly that carelessly fluttering among the flowers, rejoices in the sun and does not suspect that she is Zhuang Tzu. But when the dream ended, Zhuang woke up and was very surprised that he is the philosopher Zhuang Tzu. He could not understand in any way: did he dream that he was a butterfly, or a butterfly dreams that she was Zhuang Tzu.

莊子 (Zhuangzi)

Mauko