The great Taoist master Chuang Tzu once dreamt that he was a
butterfly fluttering here and there. In the dream he had no awareness of
his individuality as a person. He was only a butterfly. Suddenly, he
awoke and found himself laying there, a person once again. But then he
thought to himself, "Was I before a man who dreamt about being a
butterfly, or am I now a butterfly who dreams about being a man?"