From the Sacred Tao Te Ching Ch 15-27

Lao Tzu’s teaching focuses on the Tao, or the amorphous, ever-flowing and ever-circulating power. Tao resides in the bodies of all beings. In the past two thousand years Lao Tzu’s teaching has given rise to Taoism, one of the three most influential spiritual and cultural traditions in China. Lao Tzu’s book, Tao Te Ching, has become a classic in the development of both philosophy and scholarship. The (state of) vacancy should be brought to the utmost degree, and that of stillness guarded with unwearying vigor. All things alike go through their processes of activity, and (then) we see them return (to their original state). When things (in the vegetable world) have displayed their luxuriant growth, we see each of them return to its root. This returning to their root is what we call the state of stillness; and that stillness may be called a reporting that they have fulfilled their appointed end…