人之有常病也。亦因其骨节皮肤腠理之不坚固者。邪之所舍也。故常为病也。
大忍痛与不忍痛者。皮肤之薄浓。肌肉之坚脆。缓急之分也。非勇怯之谓也。
人之骨强。筋弱。肉缓。皮肤浓者。耐痛。其于针石之痛。火 亦然。( 音泄。艾火
烧灼。)坚肉薄皮者。不耐针石之痛。于火 亦然。
背中大 。在杼骨之端。肺 在三焦之间。心 在五焦之间。膈 在七焦之间。肝 在
之间。脾 在十一焦之间。肾 在十四焦之间。皆挟脊相去三寸所。则欲得而验之。按其处
应在中而痛解。乃其 也。灸之则可。刺之则不可。气盛则泻之。虚则补之以火补者。毋吹
其火。须自灭也。以火泻者。疾吹其火。传其艾。须其火灭也。
气之逆顺者。所以应天地阴阳四时五行也。脉之盛衰者。所以候血气之虚实有余不足也
。刺之大约者。必明知病之可刺。与其未可刺。与其已。不可刺也。(已者言病既已也。)
贼风邪气之伤人也。令人病焉。尝有所伤于湿气。藏于血脉之中。分肉之间。久留而不
去。
若有所堕坠。恶血在内而不去。卒然喜怒不节饮食不适。寒温不时。腠理闭而不通。其开而
遇风寒。则血气凝结。与故邪相袭。则为寒痹。其有热则汗出。汗出则受风。虽不遇贼风邪
气。必有因加而发焉。
人之所以常有疾病，也是由于其骨节、皮肤和腠理（皮肤纹理及汗孔）不够坚固，邪气容易停留其中，所以常成为发病的部位。
大抵能忍受疼痛与不能忍受疼痛的人，其皮肤的厚薄、肌肉的坚实或脆弱、筋肉的松弛或紧张是不同的，这并不是指人的勇敢或怯懦。
人的骨骼强健、筋脉柔弱、肌肉松弛、皮肤厚实的人，能够耐受疼痛，他们对针刺和砭石治疗的疼痛也能忍受，对艾灸（音泄，艾火烧灼）亦然。肌肉坚实而皮肤薄的人，不能耐受针刺和砭石的疼痛，对艾灸亦然。
背部的膈俞穴，位于脊柱旁开三寸处的椎骨端部。肺俞穴位于第三胸椎棘突下旁开一寸五分处（注：原文“三焦”此处疑为传抄错误，通常指第三胸椎旁，即肺俞位置，但依原文直译需保留原意或按标准穴位解释，此处依原文结构处理，实际解剖对应背部特定椎体旁）。心俞穴位于第五胸椎棘突下旁开一寸五分处。膈俞穴位于第七胸椎棘突下旁开一寸五分处。肝俞穴位于第九胸椎棘突下旁开一寸五分处。脾俞穴位于第十一胸椎棘突下旁开一寸五分处。肾俞穴位于第十四胸椎棘突下旁开一寸五分处。这些穴位都夹着脊柱，相互之间距离大约三寸左右。想要验证这些穴位的位置，可以按压该处，如果感到疼痛缓解，那就是正确的穴位。对这些穴位施灸是可以的，但针刺则不可行。如果经气盛实就用泻法，虚损就用补法。用艾灸进行补法时，不要吹火，必须让艾火自然熄灭；用艾灸进行泻法时，要快速吹火，使艾火迅速燃烧，直到艾火熄灭为止。
气的逆顺变化，是用来顺应天地阴阳四时五行的规律的。脉象的盛衰，是用来候察血气虚实有余不足的。针刺的大致原则，必须明确知道疾病哪些情况可以针刺，哪些不可以针刺，以及已经痊愈或不可再刺的情况。（“已”是指病已经痊愈。）
贼风邪气伤人，使人患病。曾经被湿气所伤，湿气藏在血脉之中、分肉（肌肉间隙）之间，长久停留而不离去。如果有跌坠损伤，恶血（瘀血）留在体内而不消散，加上突然喜怒不节制、饮食不适宜、寒温调节不当，导致腠理闭塞不通。当腠理开放时又遇到风寒，就会导致血气凝结，与原有的邪气相合，这就形成寒痹。如果有热邪，就会出汗，出汗后容易受风。即使没有遇到贼风邪气，也必定会有因诱因诱发而发作的情况。
The reason why people often suffer from chronic diseases is also due to the lack of firmness in their bones, joints, skin, and Couli (the spaces between skin and muscle where pathogens may lodge). Since this is where pathogens reside, it is naturally prone to disease.
Those who can endure pain greatly versus those who cannot differ in the thickness of their skin, the firmness or fragility of their muscles, and the tension or laxity of their flesh; this is not a matter of courage or timidity.
Individuals with strong bones, weak sinews, loose flesh, and thick skin are able to endure pain. They can tolerate the pain of acupuncture needles and stone tools (Bianshi), as well as moxibustion (Moxa burning/scalding). Conversely, those with firm flesh and thin skin cannot tolerate the pain of needles and stone tools, nor can they tolerate moxibustion.
The Ge Shu (Diaphragm-Shu) point on the back is located at the end of the vertebral processes. The Fei Shu (Lung-Shu) point is located between the third and fourth vertebrae (Note: Text says "San Jiao" but anatomically corresponds to T3 level for Lung Shu in standard texts, here translated literally as per source structure regarding vertebral levels). The Xin Shu (Heart-Shu) point is located between the fifth and sixth vertebrae. The Ge Shu (Diaphragm-Shu) point is located between the seventh and eighth vertebrae. The Gan Shu (Liver-Shu) point is located between the ninth and tenth vertebrae. The Pi Shu (Spleen-Shu) point is located between the eleventh and twelfth vertebrae. The Shen Shu (Kidney-Shu) point is located between the fourteenth and fifteenth vertebrae. All these points flank the spine, spaced approximately three cun apart. To verify their location, press the area; if pressing relieves pain or elicits a specific sensation, that is the correct acupoint. Moxibustion is permissible, but needling is contraindicated. If Qi is excessive, apply the reducing method; if deficient, apply the tonifying method. For the tonifying method with fire, do not blow on the moxa; let it extinguish naturally. For the reducing method with fire, blow rapidly to accelerate combustion until the moxa extinguishes.
The flow of Qi (smooth or reversed) corresponds to the Yin and Yang, Four Seasons, and Five Phases of Heaven and Earth. The fullness or emptiness of the pulse serves to observe the excess or deficiency of Blood and Qi. The general principles of needling require knowing clearly which conditions are suitable for needling, which are not, and which have already resolved or are no longer treatable by needling ("Yi" refers to the disease having already resolved).
When Zefeng (thievish wind/pathogenic factors) injures the human body, it causes disease. One may have previously been injured by dampness, which hides within the blood vessels and between the muscle layers, lingering for a long time without departing. If there has been a fall causing evil blood (stasis) to remain inside, combined with sudden unregulated emotions (joy or anger), improper diet, and irregular exposure to cold and heat, the Couli become closed and obstructed. When the Couli open and encounter wind-cold, the Blood and Qi coagulate, combining with the existing pathogen to form Cold Bi (painful obstruction syndrome). If there is heat, sweating occurs; after sweating, one becomes susceptible to wind. Even without encountering thievish wind-pathogens, an attack will inevitably occur due to these precipitating factors.