Chapter 21, Part 3A - Chuang Tzu

Yen Yuan said to Confucius, "Master, when you walk, I walk; when you trot, I trot; when you gallop, I gallop. But when you break into the kind of dash that leaves even the dust behind, all I can do is stare after you in amazement!"

"Hui, what are you talking about?" asked the Master.

"When you walk, I walk - that is, I can speak just as you speak. When you trot, I trot - that is, I can make discriminations just as you do. When you gallop, I gallop - that is, I can expound the Way just as you do. But when you break into the kind of dash that leaves even the dust behind and all I can do is stare after you in amazement - by that I mean that you do not have to speak to be trusted, that you are catholic and not partisan,' that although you lack the regalia of high office the people still congregate before you, and with all this, you do not know why it is so."
~ Burton Watson translation via Terebess Asia Online ~

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