In the beginning, there was an endless void: Wuji (Limitless) represents the primordial state of non-being, the undifferentiated and infinite void that precedes the manifestation of the universe

From this vast cosmic universe, from Tao, the One emerges.

As the One manifests in the world, it divides into two: the Yin and the Yang, complementary conditions of action (Yang) and inaction (Yin). This stage represents the emergence of duality/polarity out of the Unity of Tao. The “dance”--the continual transformations--of Yin and Yang fuels the flow of qi (chi) In Taoist cosmology, Qi is in constant transformation between its condensed material state and its dilute energetic state. 

From this dance of Yin and Yang emerges the five elements: wood, fire, metal, water, and earth. Also produced here are the eight trigrams (Bagua) which form the 64 hexagrams of the Yijing (I Ching). This stage represents the formation, out of the initial Yin/Yang duality, of the elemental constituents of the phenomenal world.

From the five constituent elements come the “ten-thousand things,” representing all of manifest existence, all of the objects, inhabitants, and phenomena of the world that we experience. Human beings, in the Taoist cosmology, are among the Ten Thousand Things--combinations of the Five Elements in different combinations. Spiritual growth and change, for Taoists, is a matter of balancing the Five Elements within the person. Unlike many religious systems, human beings are not regarded as something separate from the natural world, but as just another manifestation of it.