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Yin and yang

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Yin and yang are fundamental concepts in ancient Chinese philosophy.

Yin and Yang symbol
Yin and Yang symbol

They represent cosmic principles or forces that are opposite yet complementary. These forces do not simply exist side by side. Instead, they interact, interconnect, support, and perpetuate one another. Together, they form a dynamic system. In this system, the whole is greater than its individual parts. Both components are essential to maintain the cohesion of the entire universe.

In Chinese mythology, the universe began as a primary chaos of primordial qi. Qi is a type of material energy. This energy eventually organized itself into the cycles of yin and yang. This process involves force and motion leading to the creation of form and matter. The organization of qi is believed to result in the formation of the "10 thousand things" between Heaven and Earth. These "things" include all aspects of the natural and human world.

Yin yang (Chinese characters)
Yin yang (Chinese characters)

The two forces are defined by contrasting natures. Yin is characterized as retractive, passive, contractive, and receptive. In contrast, yang is described as repelling, active, expansive, and repulsive. This dichotomy appears in all patterns of change in nature. For example, these forces are seen in biological, psychological, and cosmological seasonal cycles. They also appear in the historical evolution of landscapes over vast periods, from days to eons. Many natural dualities, such as light and dark or fire and water, are viewed as physical manifestations of this duality.

Before yin and yang exist, there is a state of oneness. This is known as Taiji, or the "Supreme Ultimate." Taiji represents a state of undifferentiated, absolute, and infinite potential. It is the oneness that exists before duality emerges. Some traditions contrast Taiji with an even older concept called wuji. Once the duality of yin and yang begins, the cosmic forces begin to shape the world. This movement from potential to duality is a central part of Chinese cosmology.

The original meanings of these words were quite literal and geographic. The term "yin" originally depicted the northerly shaded side of a hill. The term "yang" referred to the bright, sunny side of a hill. Because sunlight in the Northern Hemisphere comes mostly from the south, the south side of a hill is yang. This distinction is still visible in Chinese place names today. For instance, Hengyang refers to the south side of Mount Heng. Luoyang refers to the north bank of the Luo River. In Japan, these characters help divide the island of Honshu into the San'in and San'yō regions.

These principles have influenced many branches of Chinese culture and science. Yin and yang are primary guidelines for traditional Chinese medicine. They are also central to various Chinese martial arts and exercises. These include kung fu, tai chi, baguazhang, qigong, and daoyin. The concepts also appear in important historical texts. These include the I Ching and the Huangdi Neijing, a famous Taoist medical treatise. The duality of opposites lies at the heart of classical Chinese technology and philosophy.

Different philosophical schools interpret the relationship between these forces in various ways. In Taoist metaphysics, the distinction between good and bad is seen as perceptual rather than real. To a Taoist, the duality of yin and yang is an indivisible whole. However, other thinkers have applied different meanings. For example, the Confucian philosopher Dong Zhongshu attached a moral dimension to the concept. Additionally, the Ahom philosophy of the individual self uses these ideas. It relates the concepts of han and pu to the yin and yang of the mind, known as hun and po. This specific tradition originated in Yunnan, China, and is followed by some Ahom people.

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File:Yin yang (Chinese characters).svg
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File:Yin and Yang symbol.svg
Yin and Yang symbol.svg
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