灵枢经·阴阳系日月 Yin and Yang Correlated with the Sun and Moon
黄帝曰：余闻天为阳，地为阴，日为阳，月为阴，其合之于人，奈何？歧伯曰：腰以上为天，腰以下为地，故天为阳，地为阴，故足之十二经脉，以应十二月，月生于水，故在下者为阴；手之十指，以应十日，日主火，故在上者为阳。
黄帝曰：合之于脉，奈何？歧伯曰：寅者，正月之生阳也，主左足之少阳；未者，六月，主右足之少阳。卯者，二月，主左足之太阳；午者，五月，主右足之太阳。辰者，三月，主左足之阳明；巳者，四月，主右足之阳明。此两阳合于前，故曰阳明。申者，七月之生阴也，主右足之少阴；丑者，十二月，主左足之少阴；酉者，八月，主右足之太阴；子者，十一月，主左足之太阴；戌者，九月，主右足之厥阴；亥者，十月，主左足之厥阴；此两阴交尽，故曰厥阳。
甲主左手之少阳；己主右手之少阳；乙主左手之太阳，戊主右手之太阳；丙主左手之阳明，丁主右手之阳明，此两火并合，故为阳明。庚主右手之少阴，癸主左手之少阴，辛主右手之太阴，壬主左手之太阴。
故足之阳者，阴中之少阳也；足之阴者，阴中之太阴也。手之阳者，阳中之太阳也；手之阴者，阳中之少阴也。腰以上者为阳，腰以下者为阴。
其于五藏也，心为阳中之太阳，肺为阴中之少阴，肝为阴中之少阳，脾为阴中之至阴，肾为阴中之太阴。
黄帝曰：以治之奈何？歧伯曰：正月二月三月，人气在左，无刺左足之阳；四月五月六月，人气在右，无刺右足之阳，七月八月九月，人气在右，无刺右足之阴，十月十一月十二月，人气在左，无刺左足之阴。
黄帝曰：五行以东方为甲乙木主春。春者，苍色，主肝，肝者，足厥阴也。今乃以甲为左手之少阳，不合于数，何也？歧伯曰：此天地之阴阳也，非四时五行之以次行也。且夫阴阳者，有名而无形，故数之可十，离之可百，散之可千，推之可万，此之谓也。
Huangdi said: "I have heard that Heaven is yang and Earth is yin, that the sun is yang and the moon is yin. How do these correspond to the human body?" Qibo said: "Above the waist corresponds to Heaven, and below the waist corresponds to Earth; thus Heaven is yang and Earth is yin. Accordingly, the twelve channel vessels of the feet correspond to the twelve months. The moon is generated from water, and so that which lies below is yin. The ten fingers of the hands correspond to the ten suns — the ten heavenly stems used to mark the days; the sun governs fire, and so that which lies above is yang."
Huangdi said: "How does this correspond to the vessels?" Qibo said: "Yin, the third earthly branch, is the first month, when yang is generated; it governs the Shaoyang of the left foot. Wei, the eighth branch, is the sixth month; it governs the Shaoyang of the right foot. Mao, the fourth branch, is the second month; it governs the Taiyang of the left foot. Wu, the seventh branch, is the fifth month; it governs the Taiyang of the right foot. Chen, the fifth branch, is the third month; it governs the Yangming of the left foot. Si, the sixth branch, is the fourth month; it governs the Yangming of the right foot. These two yang channels come together at the front, and so this is called Yangming, the confluence of yang. Shen, the ninth branch, is the seventh month, when yin is generated; it governs the Shaoyin of the right foot. Chou, the second branch, is the twelfth month; it governs the Shaoyin of the left foot. You, the tenth branch, is the eighth month; it governs the Taiyin of the right foot. Zi, the first branch, is the eleventh month; it governs the Taiyin of the left foot. Xu, the eleventh branch, is the ninth month; it governs the Jueyin of the right foot. Hai, the twelfth branch, is the tenth month; it governs the Jueyin of the left foot. These two yin channels meet and are exhausted together, and so this is called Jueyin."
Jia, the first heavenly stem, governs the Shaoyang of the left hand; Ji, the sixth stem, governs the Shaoyang of the right hand. Yi, the second stem, governs the Taiyang of the left hand; Wu, the fifth stem, governs the Taiyang of the right hand. Bing, the third stem, governs the Yangming of the left hand; Ding, the fourth stem, governs the Yangming of the right hand — these two fires unite together, and so this too is called Yangming. Geng, the seventh stem, governs the Shaoyin of the right hand; Gui, the tenth stem, governs the Shaoyin of the left hand; Xin, the eighth stem, governs the Taiyin of the right hand; Ren, the ninth stem, governs the Taiyin of the left hand.
Thus the yang channels of the foot are the lesser yang within yin; the yin channels of the foot are the greater yin within yin. The yang channels of the hand are the greater yang within yang; the yin channels of the hand are the lesser yin within yang. That which is above the waist is yang; that which is below the waist is yin.
With regard to the five viscera: the heart is the greater yang within yang; the lung is the lesser yin within yin; the liver is the lesser yang within yin; the spleen is the utmost yin within yin; and the kidney is the greater yin within yin.
Huangdi said: "How does one apply this in treatment?" Qibo said: "In the first, second, and third months, human qi resides on the left, so one should not needle the yang channels of the left foot. In the fourth, fifth, and sixth months, human qi resides on the right, so one should not needle the yang channels of the right foot. In the seventh, eighth, and ninth months, human qi resides on the right, so one should not needle the yin channels of the right foot. In the tenth, eleventh, and twelfth months, human qi resides on the left, so one should not needle the yin channels of the left foot."
Huangdi said: "Among the five phases, the east corresponds to Jia and Yi, which belong to wood and govern spring. Spring's color is green-blue, and it governs the liver; the liver corresponds to the Foot Jueyin. Yet now you say that Jia governs the Shaoyang of the left hand — this does not accord with the numerical sequence. Why is this?" Qibo said: "This concerns the yin and yang of Heaven and Earth, not the sequential progression of the four seasons and five phases. Moreover, yin and yang have names but no fixed form; hence they may be counted as ten, divided into a hundred, dispersed into a thousand, and extended into ten thousand — this is precisely what is meant."