Chapter 28, Part 6B - Chuang Tzu

Tseng Tzu lived in the state of Wei, wearing a robe of quilted hemp with the outside worn through, his face blotchy and swollen, his hands and feet hard and callused. He would go three days without lighting a fire, ten years without making himself a new suit of clothes. If he tried to straighten his cap, the chin strap would break; if he pulled together his lapels, his elbows poked through the sleeves; if he stepped into his shoes, his heels broke out at the back.

Yet, shuffling along, he would sing the sacrificial hymns of Shang in a voice that filled heaven and earth, as though it issued from a bell or a chiming stone. The Son of Heaven could not get him for his minister; the feudal lords could not get him for their friend. Hence he who nourishes his will forgets about his bodily form; he who nourishes his bodily form forgets about questions of gain; and he who arrives at the Way forgets about his mind.
~ Burton Watson translation via Terebess Asia Online ~

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