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Chapter 29 Discourse on the Major yin and on the yang Brilliance [Conduits] 29-179-4 Huang Di asked: “The major yin [conduit] and the yang brilliance [conduit] constitute exterior and interior; they are the vessels of spleen and stomach. [and yet,] the diseases generated [in them] are different! How is that?”1 Qi Bo responded: “yin and yang [conduits occupy] different positions.2 alternately they are depleted or replete.3 alternately [the movement of their contents] is contrary to or complies with [the regular course]. some [i.e., the yin vessels] follow the inside; some [i.e., the yang vessels] follow the outside. What they follow is not identical. Hence [their] diseases have different names.”4 1 Wang Bing: “The spleen depot and the stomach palace are both associated with [the agent] soil.The diseases that emerge [in spleen and stomach] are different.Hence [Huang Di] inquired about their not being alike.” 2 Zhang Zhicong: “ ‘yin and yang [occupy] different positions’ is to say: the major yin is located above and the yang brilliance is located below.” 3 Zhang Zhicong: “That is to say: when the passage ways of yang are replete, the passage ways of yin are depleted.” 4 Wang Bing: “The spleen depot is yin; the stomach palace is yang. The yang vessels move downwards; the yin vessels move upwards. The yang vessels follow the outside; the yin vessels follow the inside. Hence [the text] states: ‘what they follow is not the same; the diseases have different names.’ ” Zhang Jiebin: “The robber wind and the depletion evil are harm [caused] from outside; they are received by the yang and they enter the five depots. Drinking and eating, rising and resting [may cause] harm from inside. Hence the yin receives this [harm] and it enters the six palaces.” Zhang Zhicong: “ ‘They may follow the inside’ is: some diseases of abdominal fullness with outflow of [undigested] food result from immoderate drinking and eating, or from untimely rising and resting. ‘They may follow the outside’ is: in some cases the body becomes hot and one pants because of [the intrusion of] robber wind and depletion evil. Hence these diseases have different names.” 480 Huang Di nei jing su wen 29-179-6 [Huang] Di: “I should like to hear about their different appearances.” Qi Bo: “The yang, that is the qi of heaven. It rules the outside. The yin, that is the qi of the earth. It rules the inside.5 Hence, the yang paths are [subject to] repletion; the yin paths are [subject to] depletion.6 Hence, when one is invaded by a robber wind or depletion evil, the yang [conduits] receive it. When food and drinks are [consumed] without restraint, when rising and resting7 occur out of time, 5 Wang Bing: “This is what is called [in the text]: ‘yin and yang [occupy] different positions.’ ” 6 Wang Bing: “This is what is called [in the text]: ‘alternately they are depleted or replete.’ ” Zhang Jiebin: “yang is hardness; yin is softness.”Wu Kun amended this to: “When the yang path is replete, the yin path is depleted; when the yin path is replete, the yang path is depleted.” 137/16: “This is what is stated in Su wen 11 as follows: ‘When the stomach is replete, the intestines are depleted; when the intestines are replete, the stomach is depleted.’” 1675/7: “ ‘yang’ refers to the stomach palace; ‘yin’ refers to the spleen depot. 道 is 規律, ‘law.’ The five depots rule the storage of essence qi; they [can be] filled, but they [can] not be replete. Hence [the text] states: 陰道虛, ‘the yin law is depletion.’ The six palaces rule the transmission and transformation of things; they [can be] replete, but they [can] not be full. Hence [the text] states: ‘the yang law is repletion.’ ” 804/54: “ ‘yang paths’ and ‘yin paths’ refers to the passage ways of diseases caused by external affection or internal harm respectively.”Mori: “The yang qi, which lacks physical appearance, nourishes the yin matter which has physical appearance. Hence, its regular state is repletion. The yin matter, which has physical appearance, receives yang qi which has no physical appearance. Hence, its regular state is depletion. as for qi and blood in the human body, [the former is] yang and is regularly replete in the outside regions [of the body]; [the latter is] yin and is regularly depleted in the inner regions [of the body]. Where there is depletion, the yang qi will occupy the depleted [region],to...

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