Chapter 10, Part 4C - Chuang Tzu

In the world everyone knows enough to pursue what he does not know, but no one knows enough to pursue what he already knows. Everyone knows enough to condemn what he takes to be no good, but no one knows enough to condemn what he has already taken to be good.

This is how the great confusion comes about, blotting out the brightness of sun and moon above, searing the vigor of hills and streams below, overturning the round of the four seasons in between. There is no insect that creeps and crawls, no creature that flutters and flies that has not lost its inborn nature. So great is the confusion of the world that comes from coveting knowledge!

From the Three Dynasties on down, it has been this and nothing else-shoving aside the pure and artless people and delighting in busy, bustling flatterers; abandoning the limpidity and calm of inaction and delighting in jumbled and jangling ideas. And this jumble and jangle has for long confused the world.
~ Burton Watson translation via Terebess Asia Online ~

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