Chapter 33, Part 1A - Chuang Tzu

Many are the men in the world who apply themselves to doctrines and policies, and each believes he has something that cannot be improved upon. What in ancient times was called the "art of the Way' - where does it exist? I say, there is no place it does not exist. But, you ask, where does holiness descend from, where does enlightenment emerge from?

The sage gives them birth, the king completes them, and all have their source in the One. He who does not depart from the Ancestor is called the Heavenly Man; he who does not depart from the Pure is called the Holy Man; he who does not depart from the True is called the Perfect Man.

To make Heaven his source, Virtue his root, and the Way his gate, revealing himself through change and transformation - one who does this is called a Sage.
~ Burton Watson translation via Terebess Asia Online ~

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