yin and yang

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Yin and Yang

(Philosophy) two complementary principles of Chinese philosophy: Yin is negative, dark, and feminine, Yang positive, bright, and masculine. Their interaction is thought to maintain the harmony of the universe and to influence everything within it
[from Chinese (Peking) yin dark + yang bright]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

yin′ and yang′

(in Chinese philosophy and religion) two principles, one negative, dark, and feminine (yin), and one positive, bright, and masculine (yang), whose interaction influences the destinies of creatures and things.
[1930–35; < Chinese yīn-yáng]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
On another level, the resulting Eastern characteristics of this composer's work - the concept of a fundamental principle that guides the organic development at various levels of the composition, the systematic derivation of pitch material, and the controlled flow of sound through organized complexity and ordered interplay - find their parallels in the music of such twentieth-century Western composers as Schoenberg, Webern, Messiaen, and Varese.(32) In Metaphors, these techniques include trichordal/dyadic representations of yin and yang, scale formations, transpositional and inversional operations, ordered permutations, invariance relationships, symmetrical designs, and large-scale formal articulations.
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The philosophy that seems to cover these two questions is the Yin and Yang with the Five Elements, which was brought to Japan in the sixth century.
One of the core tenets of Traditional Chinese Medicine (TCM) is the importance of balancing yin and yang within the body, which in the case of the yang-deficient couple means avoiding cold beverages and foods, which are (yin) in nature, while trying to consume beverages and foods that are more yang (warm) in nature to build it up in the bodies.
Based on this belief, people symbolized everything as colors, objects and directions then simplified them into the very basic codes, yin and yang or even and odd numbers in the mathematical system and the five elements.
According to folkloric account, it was Buddha who chose and arranged the animals according to their perceived attributes and Chinese yin and yang, the two fundamental forces in the universe.
I believe that two forces need to be in balance, which I will refer to as yin and yang, borrowing from the Chinese philosophy of life forces which complement each other for harmony.
Yang, Jwing-Ming acknowledges this when describing how to apply yin and yang concepts to qigong, saying, "Many people, even some qigong practitioners, are still confused by this."
From highest to lowest frequency in the two-factor group are phlegm-damp retention, deficiency of both yin and yang, Liver-kidney yin deficiency, dual deficiency of qi and yin, qi stagnation and blood stasis, and qi deficiency with blood stasis.
Yin and Yang are forces that are opposite, yet mutually supportive, and in constant flux.