Chapter 17, Part 7B - Chuang Tzu

"What do you mean by the Heavenly and the human?"

Jo of the North Sea said, "Horses and oxen have four feet - this is what I mean by the Heavenly. Putting a halter on the horse's head, piercing the ox's nose - this is what I mean by the human. So I say: do not let what is human wipe out what is Heavenly; do not let what is purposeful wipe out what is fated; do not let [the desire for] gain lead you after fame. Be cautious, guard it, and do not lose it - this is what I mean by returning to the True."
~ Burton Watson translation via Terebess Asia Online ~

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