Chapter 33, Part 6B - Chuang Tzu

Above he wandered with the Creator, below he made friends with those who have gotten outside of life and death, who know nothing of beginning or end. As for the Source, his grasp of it was broad, expansive, and penetrating; profound, liberal, and unimpeded.

As for the Ancestor, he may be said to have tuned and accommodated himself to it and to have risen on it to the greatest heights.

Nevertheless, in responding to change and expounding on the world of things, he set forth principles that will never cease to be valid, an approach that can never be shuffled off. Veiled and arcane, he is one who has never been completely comprehended.
~ Burton Watson translation via Terebess Asia Online ~

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