Editing Yin and yang (section)

== Modern usage ==
Yin is the black side, and yang is the white side. Other color arrangements have included the white of yang being replaced by red.<ref name=":0">{{Cite book |title=The World Book Encyclopedia |publisher=[[Scott Fetzer Company]] |year=2003 |isbn=0-7166-0103-6 |edition= |volume=19 |location=Chicago |page=36 |oclc=50204221}}</ref> The taijitu is sometimes accompanied by other shapes,<ref name=":05">{{Cite book |last1=Carrasco |first1=David |title=Merriam-Webster's Encyclopedia of World Religions |last2=Warmind |first2=Morten |last3=Hawley |first3=John Stratton |last4=Reynolds |first4=Frank |last5=Giarardot |first5=Norman |last6=Neusner |first6=Jacob |last7=Pelikan |first7=Jaroslav |last8=Campo |first8=Juan |last9=Penner |first9=Hans |publisher=[[Merriam-Webster]] |editor=[[Wendy Doniger]] |year=1999 |isbn=978-0-87779-044-0 |location=United States |page=495 |language=en |author-link=David Carrasco |author-link6=Jacob Neusner |author-link7=Jaroslav Pelikan}}</ref> such as [[bagua]].<ref name=":0" /><ref name=":05" />

In turn, the concepts are also applied to the human body. In traditional Chinese medicine, one's health is directly related to the balance between yin and yang qualities within them.<ref>Li CL. A brief outline of Chinese medical history with particular reference to acupuncture. Perspect Biol Med. 1974 Autumn;18(1):132–143.</ref> The technology of yin and yang is the foundation of [[Critical thinking|critical]] and [[deductive]] reasoning for effective differential diagnosis of disease and illnesses within Taoist influenced [[Eight principles|traditional Chinese medicine]].<ref>{{Cite book |last1=Ching |first1=Nigel |title=The art and practice of diagnosis in Chinese medicine |last2=Halpin |first2=Jeremy |date=2017 |publisher=Singing Dragon |isbn=978-0-85701-267-8 |location=London Philadelphia}}</ref><ref>{{Cite book |title=Traditional Chinese medicine: theory and principles |date=2016 |publisher=De Gruyter |isbn=978-3-11-041766-1 |editor-last=Hu |editor-first=Dongpei |location=Berlin Boston}}</ref><ref>{{Cite book |last=Seem |first=Dr. Mark |title=Acupuncture Energetics A Workbook for Diagnostics and Treatment |publisher=Inner Traditions/Bear |year=1991 |isbn=978-0-89281-435-0}}</ref><ref>{{Cite book |title=Acupuncture Therapeutics |publisher=Jessica Kingsley Publishers |year=2011 |isbn=978-0-85701-018-6 |page=23}}</ref>

=== ''Taijitu'' ===
{{Main|Taijitu}}
[[File:Yin and Yang symbol.svg|thumb|The ''[[taijitu]]'']]

The principle of yin and yang is represented by the ''taijitu'' (literally "diagram of the [[Supreme Ultimate]]"). The term is commonly used to mean the simple "divided circle" form, but may refer to any of several schematic diagrams representing these principles, such as the [[swastika]], common to Hinduism, Buddhism, and Jainism. Similar symbols have also appeared in other cultures, such as in [[Celtic art]] and [[Notitia Dignitatum#Depictions|Roman shield markings]].<ref name="Giovanni Monastra (2000)">Giovanni Monastra: "{{usurped|1=[https://web.archive.org/web/20110925054740/http://www.estovest.net/tradizione/yinyang_en.html The "Yin–Yang" among the Insignia of the Roman Empire?]}}," "Sophia," Vol. 6, No. 2 (2000)</ref><ref name="Late Roman Shield Patterns">{{cite web |url=http://www.ne.jp/asahi/luke/ueda-sarson/MagisterPeditum.html |title=Late Roman Shield Patterns – Magister Peditum |work=www.ne.jp}}</ref><ref name="Helmut Nickel (1992), 146, 5">Helmut Nickel: "The Dragon and the Pearl," ''Metropolitan Museum Journal,'' Vol. 26 (1991), p. 146, fn. 5</ref>

In this symbol the two teardrops swirl to represent the conversion of yin to yang and yang to yin. This is seen when a ball is thrown into the air with a yang velocity then converts to a yin velocity to fall back to earth. The two teardrops are opposite in direction to each other to show that as one increases the other decreases. The dot of the opposite field in the tear drop shows that there is always yin within yang and always yang within yin.<ref>{{Cite book |last=Hughes |first=Kevin |title=Introduction to the Theory of Yin-Yang |publisher=Independent |year=2020 |isbn=979-8-6678-6786-9 |location= |pages=}}{{page needed|date=October 2022}}</ref>

=== Tai chi ===
{{Main|Tai chi}}
Tai chi, a form of martial art, is often described as the principles of yin and yang applied to the human body and an animal body. [[Wu Jianquan]], a famous [[Chinese martial arts]] teacher, described tai chi (''taijiquan'') as follows:

{{blockquote|Various people have offered different explanations for the name ''Taijiquan''. Some have said: – 'In terms of [[meditation|self-cultivation]], one must train from a state of movement towards a state of stillness. ''[[Taiji (philosophy)|Taiji]]'' comes about through the balance of ''yin'' and ''yang''. In terms of the art of attack and defense then, in the context of the [[I Ching|changes]] of full and empty, one is constantly internally latent, to not outwardly expressive, as if the ''yin'' and ''yang'' of ''Taiji'' have not yet divided apart.' Others say: 'Every movement of ''Taijiquan'' is based on circles, just like the shape of a ''Taijitu''. Therefore, it is called ''Taijiquan''.|Wu Jianquan|The International Magazine of T{{Wg-apos}}ai Chi Ch{{Wg-apos}}üan<ref>{{cite journal |last=Woolidge |first=Doug |title=The International Magazine of T{{Wg-apos}}ai Chi Ch{{Wg-apos}}üan |volume=21 |issue=3 |journal=Tʻai Chi |publisher=Wayfarer Publications |date=June 1997 |issn=0730-1049}}</ref>}}