Chapter 16, Part 2A - Chuang Tzu

The men of old dwelt in the midst of crudity and chaos; side by side with the rest of the world, they attained simplicity and silence there. At that time the yin and yang were harmonious and still, ghosts and spirits worked no mischief, the four seasons kept to their proper order, the ten thousand things knew no injury, and living creatures were free from premature death. Although men had knowledge, they did not use it. This was called the Perfect Unity. At this time, no one made a move to do anything, and there was unvarying spontaneity.
~ Burton Watson translation via Terebess Asia Online ~

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