Yin and Yang

According to Chinese philosophy, Yin is the passive female principle of the universe and Yang is the active male principle of the universe. Yin literally means "shady place" and Yang means "sunny place".

Although they represent a pair of opposites, they are considered to be two complementary forces that interact with one another and are part of one another, for example, life and death, or light and darkness; one cannot exist without the other.

Yin and Yang is symbolized in the taijitu. The taijitu represents an ancient Chinese understanding of how things work. The outer circle represents the entirety of perceivable phenomena, while the black and white shapes within the circle represent the interaction of two principles or aspects, called "yin" (black) and "yang" (white), which cause the phenomena to appear in their peculiar way. Each of them contains an element or seed of the other, and they cannot exist without each other.