Chapter 33, Part 4D - Chuang Tzu

T'ien P’ien was a similar case. He studied under P'eng Meng and learned what it means not to compare things. P'eng Meng's teacher used to say, "In ancient times the men of the Way reached the point where they regarded nothing as right and nothing as wrong - that was all." But such ways are mute and muffled - how can they be captured in words?

P'eng Meng and T'ien P’ien always went contrary to other men and were seldom heeded. They could not seem to avoid lopping away at the corners. What they called the Way was not the true Way, and, when they said a thing was right, they could not avoid raising the possibility that it might be wrong.' P'eng Meng, T'ien P'ien, and Shen Tao did not really understand the Way, though all had at one time heard something of what it was like.
~ Burton Watson translation via Terebess Asia Online ~

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