《太阴阳明论》曰∶太阴阳明为表里，脾胃脉也。生病而异者，何也？岐伯曰∶阴阳异位，
更虚更实，更逆更从，或从内，或从外，所从不同，故病异名也。（脾脏为阴，胃府为阳，阳脉下行，
阴脉上行，阳脉从外，阴脉从内，故言所从不同、病异名也。春夏阳明为实，太阴为虚，秋冬
阳明为虚，太阴为实，即更实更虚也。春夏太阴为逆，阳明为从，秋冬阳明为逆，太阴为从，即
更逆更从也。）阳者，天气也，主外；阴者，地气也，主内。（是所谓阴阳异位也。）故阳道实，
阴道虚。（是所谓更实更虚也。）犯贼风虚邪者，阳受之∶食饮不节，起居不时者，阴受之。
（是所谓或从内或从外也。阳受之则入六腑，阴受之则入五脏。入六腑则身热不时卧，上为喘呼；
入五脏则 满闭塞，下为飧泄，久为肠 。（是所谓所从不同病异名也。）故喉主天气，咽主地
气，故阳受风气，阴受湿气。（同气相求耳。）故阴气从手行至头，而下行循臂至指端；阳气从手上
行至头，而下行至足。（是所谓更逆更从也。《灵枢》曰∶手之三阴，从脏走手；手之三阳，从
手走头；足之三阳，从头走足；足之三阴，从足走腹。所行而异，故更逆更从也。）故曰阳病者，
上行而极下，阴病者，下行而极上。故伤于风者，上先受之；伤于湿者，下先受之。
脾不主时何也？（肝主春，心主夏，肺主秋，肾主冬，四脏皆有正应，而脾无正主也。）
脾者，土也，治中央，常以四时长四脏，各十八日寄治，不得独主于时也。脾脏者，常着胃土之精
也。土者，生万物，而法天地，故上下至头足。足太阴者，三阴也，故太阴为之行气于三阴。阳明
者，表也，五脏六腑之海也，亦为之行气于三阳。脏腑各因其经，而受气于阳明。
《太阴阳明论》说：太阴和阳明互为表里，是脾胃的经脉。它们生病表现不同，是什么原因呢？岐伯回答说：阴阳部位不同，虚实交替变化，逆顺关系转换，有的病邪从内部产生，有的从外部侵入，来源不同，所以疾病名称也不同。（脾脏属阴，胃腑属阳，阳脉下行，阴脉上行，阳脉主外，阴脉主内，所以说来源不同、疾病名称不同。春夏季节阳明经气实而太阴经气虚，秋冬季节阳明经气虚而太阴经气实，这就是虚实交替。春夏季节太阴为逆、阳明为顺，秋冬季节阳明为逆、太阴为顺，这就是逆顺交替。）阳气代表天气，主管外部；阴气代表地气，主管内部。（这就是所说的阴阳部位不同。）所以阳道多实，阴道多虚。（这就是所说的虚实交替。）遭受贼风虚邪侵袭的，阳经受之；饮食不节制、起居无规律的，阴经受之。（这就是所说的有的从内、有的从外。阳经受邪则传入六腑，阴经受邪则传入五脏。传入六腑则出现身体发热、不能按时安卧，向上表现为气喘呼叫；传入五脏则出现胸腹痞满闭塞，向下表现为完谷不化的泄泻，日久发展为肠澼（痢疾）。（这就是所说的来源不同、疾病名称不同。）所以喉主管天气，咽主管地气，因此阳经受风气，阴经受湿气。（这是同气相求的道理。）所以阴气从手行至头部，再下行沿手臂至手指末端；阳气从手上行至头部，再下行至足部。（这就是所说的逆顺交替。《灵枢》说：手之三阴经，从内脏走向手部；手之三阳经，从手部走向头部；足之三阳经，从头部走向足部；足之三阴经，从足部走向腹部。运行路径不同，所以有逆顺之分。）所以说阳病者，病势向上发展到极点则向下传变；阴病者，病势向下发展到极点则向上传变。所以被风邪所伤的，上部先受邪；被湿邪所伤的，下部先受邪。
为什么脾不单独主司一个季节呢？（肝主春，心主夏，肺主秋，肾主冬，四脏都有对应的正季，而脾没有单独主宰的季节。）脾属土，治理中央，常在四季中滋养四脏，每季最后十八天由脾寄治，所以不能单独主宰某个季节。脾脏，常常彰显胃土的精微。土能生养万物，效法天地，所以其气上下通达头足。足太阴脾经是三阴经之一，所以太阴经为三阴经运行气血。阳明胃经是表经，是五脏六腑气血汇聚的海源，也为三阳经运行气血。脏腑各自通过其经脉，从阳明接受气血。
The *Taiyin Yangming Lun* (Treatise on Taiyin and Yangming) states: Taiyin and Yangming are exterior-interior counterparts, belonging to the Spleen and Stomach meridians. Why do they manifest different diseases? Qibo replied: The locations of Yin and Yang differ; they alternate between deficiency and excess, and between reversal and compliance. Some pathogens originate from within, others from without. Since their origins differ, the disease names vary accordingly. (The Spleen Zang is Yin, the Stomach Fu is Yang. Yang meridians descend, Yin meridians ascend. Yang meridians govern the exterior, Yin meridians govern the interior. Hence, it is said that origins differ and disease names vary. In spring and summer, Yangming is in a state of excess while Taiyin is in deficiency; in autumn and winter, Yangming is in deficiency while Taiyin is in excess. This is the alternation of excess and deficiency. In spring and summer, Taiyin is considered "reversal" (ni) and Yangming "compliance" (cong); in autumn and winter, Yangming is "reversal" and Taiyin "compliance". This is the alternation of reversal and compliance.) Yang represents Heaven Qi, governing the exterior; Yin represents Earth Qi, governing the interior. (This is what is meant by differing locations of Yin and Yang.) Therefore, the Path of Yang tends toward excess, and the Path of Yin tends toward deficiency. (This is the alternation of excess and deficiency.) Those who contract thieving winds and empty pathogens are affected by Yang; those whose diet is irregular and daily routine untimely are affected by Yin. (This is what is meant by some originating from within and others from without. When Yang is affected, the pathogen enters the Six Fu Organs; when Yin is affected, it enters the Five Zang Organs. Entering the Six Fu Organs leads to fever and inability to lie down at proper times, with upward manifestations such as panting and calling out; entering the Five Zang Organs leads to fullness and obstruction, with downward manifestations such as undigested stool diarrhea (Sun Xie), which over time develops into Chang Pi (dysentery/intestinal inflammation). This is what is meant by different origins leading to different disease names.) Thus, the throat governs Heaven Qi, and the pharynx governs Earth Qi. Therefore, Yang meridians receive Wind pathogens, and Yin meridians receive Dampness pathogens. (This is due to the attraction of similar energies.) Thus, Yin Qi flows from the hands to the head, then descends along the arms to the fingertips; Yang Qi flows from the hands to the head, then descends to the feet. (This is the alternation of reversal and compliance. The *Ling Shu* states: The Three Yin Meridians of the Hand travel from the Zang organs to the hands; the Three Yang Meridians of the Hand travel from the hands to the head; the Three Yang Meridians of the Foot travel from the head to the feet; the Three Yin Meridians of the Foot travel from the feet to the abdomen. Their paths differ, hence there is alternation of reversal and compliance.) Therefore, it is said that Yang diseases, after reaching their peak upward, tend to descend; Yin diseases, after reaching their peak downward, tend to ascend. Thus, those injured by Wind are first affected in the upper parts; those injured by Dampness are first affected in the lower parts.
Why does the Spleen not govern a specific season? (The Liver governs Spring, the Heart Summer, the Lung Autumn, and the Kidney Winter. The Four Zang organs each have a corresponding primary season, but the Spleen does not have one.) The Spleen belongs to Earth, manages the Center, and nourishes the Four Zang organs throughout the four seasons. It presides for eighteen days during the last period of each season, and thus cannot exclusively govern a single season. The Spleen Zang constantly manifests the essence of the Stomach Earth. Earth generates all things and models Heaven and Earth, so its qi extends from the top to the bottom, reaching the head and feet. The Foot-Taiyin [Spleen] meridian is among the Three Yin meridians; therefore, Taiyin circulates Qi through the Three Yin meridians. Yangming [Stomach] is the exterior and the Sea of the Five Zang and Six Fu organs; it also circulates Qi through the Three Yang meridians. The Zang and Fu organs each receive Qi from Yangming via their respective meridians.