Chapter 17, Part 5 - Chuang Tzu

"A beam or pillar can be used to batter down a city wall, but it is no good for stopping up a little hole - this refers to a difference in function. Thoroughbreds like Ch'i-chi and Hua-liu could gallop a thousand li in one day, but when it came to catching rats they were no match for the wildcat or the weasel - this refers to a difference in skill. The horned owl catches fleas at night and can spot the tip of a hair, but when daylight comes, no matter how wide it opens its eyes, it cannot see a mound or a hill - this refers to a difference in nature.

"Now do you say, that you are going to make Right your master and do away with Wrong, or make Order your master and do away with Disorder? If you do, then you have not understood the principle of heaven and earth or the nature of the ten thousand things. This is like saying that you are going to make Heaven your master and do away with Earth, or make Yin your master and do away with Yang. Obviously it is impossible. If men persist in talking this way without stop, they must be either fools or deceivers!

"Emperors and kings have different ways of ceding their thrones; the Three Dynasties had different rules of succession. Those who went against the times and flouted custom were called usurpers; those who went with the times and followed custom were called companions of righteousness. Be quiet, be quiet, O Lord of the River! How could you understand anything about the gateway of nobility and meanness or the house of great and small?"
~ Burton Watson translation via Terebess Asia Online ~

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