12變常

12變常(12변상)
기백은 '황제내경 6원정기대론'에서,"凡此十二變者 報德以德 報化以化 報政以政 報令以令 氣高則高 氣下則下 氣後則後 氣前則前 氣中則中 氣外則外 位之常也"(무릇 12變이란 德으로 德을 갚고, 化로 化를 갚고, 政으로 政을 갚고, 令으로 令을 갚고, 氣가 上이면 上, 氣가 下면 下, 氣가 後면 後, 氣가 前이면 前, 氣가 中이면 中, 氣가 外면 外에 位하는 것이 常입니다)라고 12變의 常을 설명한다.

Twelve changes condition
Qibo in Liuyuan Zhengji Dalunpian: Major Discussion on the Progress of the Six Climatic Changes said, “From the twelve changes, it can be seen that the De (infulence) of all the things in nature correspond to the De (influence)．If the effect is Hua (transformation), the response is Hua (transformation); if the effect of is Zheng (domination), the response is Zheng (domination);if the effect is Ling (manifestation), the response is Ling (manifestation); if the effect is high, the response is high; if the effect of Six-Qi is low, the response is low; if the effect is in the back, the response is in the back; if the effect is in the front, the response is in the front; if the effect is in the middle, the response is in the middle; if the effect is in the external, the response is in the external. These are the general conditions of the location．” It explains the condition of twelve changes.

12变常
岐伯在黄帝内经素问，六元正纪大论里说，“凡此十二种变化情况，六气施之以德，则万物应之以德；六气施之以化，则万物应之以化；六气施之以政，则万物应之以政；六气施之以令，则万物应之以令。气在上的，则病位高；气在下的，则病位低；气在后的，则病位在后；气在前的，则病位在前；气在中的，则病位在中；气在外的，则病位在外。这是六气致病的病位常规。”
解释12变的常。