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。
东垣先生的医书一册，我的府邸已经刻版印刷并流传于世了。如今又得到一本书，也是东垣先生诊治疾病的方法，名叫《此事难知》。大概医学这门道术，是用来延续人类的性命，并与天地生生不息的德行一样，不可在一旦之间泯灭的。秦朝焚烧六经，从而废弃了周公、孔子的道统，幸好医书留存于世。考察那些经典著作，就能知道黄帝与岐伯的论辩，反复推演阐明五运七气（指五行之气的运行变化及风、热、火、湿、燥、寒六种气候因素）的奥秘，以此确立补益和泻实的治疗方法，用来拯救人们的疾病，而人的生死都系于此。自从岐伯、黄帝的时代久远之后，能够推究五运七气，观察阴阳升降的征候，确定脏腑虚实产生的原因，结合经络上下所属的联系，并且能够起死回生的人就很少了。唉！能够继承并发扬光大这一学术的人，大概只有东垣先生吧。先生的这本书，说的是外人不传的秘诀，确实是人所难以理解的。然而方剂虽然记载了其妙理，但有不可明说的地方，在于用心领会、神意契合罢了。唐代许胤宗说：医生靠的是意念思考。思虑精微就能掌握它，说的就是这个意思吧。而孟子说：木匠和车匠，能教给人规矩法度，但不能教给人灵巧的技巧，也是这个意思。我因此用它来延寿修行，并与天下的士人共同分享，那么救济人类、利益万物的一个方面，未必没有小小的补益吧。成化甲辰年（1484年）仲夏十六日，荆南一人记识。
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.