Zhuangzi said this quote

Once upon a time, I dreamt I was a butterfly, fluttering hither and thither, to all intents and purposes a butterfly. I was conscious only of my happiness as a butterfly, unaware that I was myself. Soon I awaked, and there I was, veritably myself again. Now I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly, dreaming I am a man.

~ Zhuangzi

Men of the world who value the Way all turn to books. But books are nothing more than words. Words have value; what is of value in words is meaning. Meaning has something it is pursuing, but the thing that it is pursuing cannot be put into words and handed down. The world values words and hands down books but, though the world values them, I do not think them worth valuing. What the world takes to be values is not real value.

~ Zhuangzi

Words are not just wind. Words have something to say. But if what they have to say is not fixed, then do they really say something? Or do they say nothing? People suppose that words are different from the peeps of baby birds, but is there any difference, or isn't there? What does the Way rely upon, that we have true and false? What do words rely upon, that we have right and wrong? How can the Way go away and not exist? How can words exist and not be acceptable? When the Way relies on little accomplishments and words reply on vain show, then we have rights and wrongs of the Confucians and the Mo-ists. What one calls right the other calls wrong; what one calls wrong the other calls right. But if we want to right their wrongs and wrong their rights, then the best to use is clarity.

~ Zhuangzi

He who knows he is a fool is not the biggest fool; he who knows he is confused is not in the worst confusion. The man in the worst confusion will end his life without ever getting straightened out; the biggest fool will end his life without ever seeing the light. If three men are traveling along and one is confused, they will still get where they are going - because confusion is in the minority. But if two of them are confused, then they can walk until they are exhausted and never get anywhere - because confusion is in the majority.

~ Zhuangzi