Chapter 22, Part 1A - Chuang Tzu

Knowledge wandered North to the banks of the Black Waters, climbed the Knoll of Hidden Heights, and there by chance came upon Do-Nothing-Say-Nothing. Knowledge said to Do-Nothing-Say-Nothing, "There are some things I'd like to ask you. What sort of pondering, what sort of cogitation does it take to know the Way? What sort of surroundings, what sort of practices does it take to find rest in the Way? What sort of path, what sort of procedure will get me to the Way?"

Three questions he asked, but Do-Nothing-Say-Nothing didn't answer. It wasn't that he just didn't answer - he didn't know how to answer!

Knowledge, failing to get any answer, returned to the White Waters of the south, climbed the summit of Dubiety Dismissed, and there caught sight of Wild-and-Witless. Knowledge put the same questions to Wild-and-Witless. "Ah - I know!" said Wild-and-Witless. "And I'm going to tell you." But just as he was about to say something, he forgot what it was he was about to say.

Knowledge, failing to get any answer, returned to the imperial palace, where he was received in audience by the Yellow Emperor, and posed his questions. The Yellow Emperor said, "Only when there is no pondering and no cogitation will you get to know the Way. Only when you have no surroundings and follow no practices will you find rest in the Way. Only when there is no path and no procedure can you get to the Way."
~ Burton Watson translation via Terebess Asia Online ~

Go here to read the introductory post to the chapters of the Book of Chuang Tzu.