Chapter 7, Part 6 - Chuang Tzu

Do not be an embodier of fame; do not be a storehouse of schemes; do not be an undertaker of projects; do not be a proprietor of wisdom. Embody to the fullest what has no end and wander where there is no trail. Hold on to all that you have received from Heaven but do not think you have gotten anything. Be empty, that is all. The Perfect Man uses his mind like a mirror - going after nothing, welcoming nothing, responding but not storing. Therefore he can win out over things and not hurt himself.
~ Burton Watson translation via Terebess Asia Online ~

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