Tao
Tao can be roughly stated to be the "flow" of the universe, or the force behind the natural order. Believed to be the influence that keeps the universe balanced and ordered, Tao is associated with nature, due to a belief that nature demonstrates the Tao. The flow of qi, as the essential energy of action and existence, is compared to the universal order of Tao. Similar to the negative theology of Western scholars, Tao is compared to what it is not. It is often considered to be the source of both existence and non-existence.
Read more about this topic: East Asian Religions