Yin and Yang

Definition and stakes

Donald A. Mackenzie,  Myths of China and Japan (1923)

“ Yin is “the principle of darkness, cold, and death, standing in the universe diametrically opposite to Yang”.46 The chief source of Yang is the sun, which gives forth “shen” or “soul substance”; the chief source of Yin is the moon. Yang strengthens the vital energy, and is the active principle in various elixirs of life, including, as De Groot notes, “the cock, jade, gold, pearls, and the products of pine and cypress trees”.47
Yin and Yang are controlled by the constellation, the Great Bear, called in China “the Bushel”.
”
Source: Gutenberg

Baron Algernon Bertram Freeman-Mitford Redesdale,  The attaché at Peking (1900)

“ We left Ku-Pei-Ko̔u the next morning, going our several ways—Saurin and Frater to Mongolia, Murray and I to the Tombs of the Mings, which I must tell you about in another letter.
As you interest yourself about Chinese curiosities and antiquities, I will add a few words about the Yang and Yin, to which I alluded in the early part of my letter.
You may have noticed on old porcelain and other ornaments this device. It is the symbol of Yang and Yin, the universal male and female principle of creation to which everything is referred. The celestial principle is male, the terrestrial female
”
Source: Gutenberg

Portrait of Mao Zedong Mao Zedong,  On Guerrilla Warfare (1989)

“ Long night marches are difficult and dangerous, but the darkness shields his approach to an unsuspecting enemy.
In every apparent disadvantage, some advantage is to be found. The converse is equally true: In each apparent advantage lie the seeds of disadvantage. The Yin is not wholly Yin, nor the Yang wholly Yang.
”
Source: Wikisource

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