Yin is the supposed “feminine” in ancient Chinese philosophy. The Chinese characters Yin and Yang originally referred to the dark and bright sides of a sunlit riverbank.
A distinct Yin-Yang school arose around 305-240 BCE, attributed to Tsou Yen. By the time of Confucius, the Tsou Yen school gained scholarly and philosophical recognition. Yin represented the Earth and, according to this schema, the associated elements of darkness, passivity, femininity, negativity and destruction.
By way of contrast, Yang came to be associated with Heaven and all the associated elements of light, activity, masculinity, positive forces and creativity.
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