东垣先生医书一帙。予府已锓梓传于世矣今又得一书
。亦东垣治疾之法。名曰此事难知盖医之为道。所以续斯人之命。而与天地生生之德不可一
朝泯也。秦焚六经。而废周公孔子之道。幸而医书存世考诸经者。则知黄帝与岐伯之论辩。
反复推明五运七气之秘以立补泄之法。所以拯斯人之疾。而人之死生系焉。岐黄既远。求能
推诸五运七气。而察阴阳升降之候。定脏腑虚实之所因。合经络上下之所属。而能起死回生
者鲜矣。噫。克绍明之者。其惟东垣先生乎。先生是书。乃言外不传之秘。诚为人所难知。
然方剂虽载其妙理。有不可得而明言者。在乎心领而神会耳。唐许胤宗曰医者意也。思虑精
则得之此之谓欤。而孟轲氏曰。梓匠轮舆。能与
人规矩。不能与人之巧。亦此谓也。予用寿行而与四方之士共焉。则济人利物之一端。未必
无小补云成化甲辰岁仲夏既望荆南一人识。
A volume of medical books by Master Dongyuan has already been carved into woodblocks and printed at my residence for dissemination in the world. Now I have obtained another book, which also contains Master Dongyuan's methods for treating diseases, titled *Ci Shi Nan Zhi* (This Matter Is Difficult to Understand). Generally speaking, the Way of medicine is used to prolong human life and aligns with the creative virtue of Heaven and Earth that generates all things; it must not be extinguished overnight. When Qin burned the Six Classics, the Way of Duke Zhou and Confucius was abandoned. Fortunately, medical texts survived. By examining these classics, one can understand the dialogues between Huangdi (Yellow Emperor) and Qibo, who repeatedly deduced and clarified the mysteries of Wuyun Qi (Five Movements and Seven Qi, referring to the dynamics of the Five Elements and six climatic factors) to establish methods of tonification (Bu, 补) and purgation (Xie, 泄), thereby saving people from illness, as human life and death depend on this. Since the times of Qibo and Huangdi have long passed, those who can deduce the Five Movements and Seven Qi, observe the signs of Yin-Yang ascending and descending, determine the causes of deficiency and excess in the Zang-Fu organs (Zang-Fu Organs, 脏腑), integrate the connections of the meridians above and below, and revive the dead are rare. Alas! The one who could inherit and illuminate this tradition is none other than Master Dongyuan. This book of his contains secrets not transmitted to outsiders; indeed, it is difficult for people to comprehend. Although the formulas record their profound principles, there are aspects that cannot be explicitly stated; they rely on mental comprehension and spiritual resonance. Xu Yinzong of the Tang Dynasty said, "The practice of medicine relies on intent/thought." If one thinks with precision, one grasps it—this is what is meant here. Mencius also said, "Carpenters and wheelwrights can teach others the compass and square (rules and standards), but they cannot teach them skill." This is also the same meaning. I use this for longevity and cultivation, sharing it with scholars everywhere. Thus, this may be a small contribution to benefiting humanity and aiding all living beings. Recorded by One Person from Jingnan on the 16th day of the mid-summer of the Jiachen year of the Chenghua era.