塞因之法妙难传，疏启中间峻补兼，此理若能知得透，谁云医道不通仙。塞治之法，甚
则骇人耳目，可谓难也已！谓气无补法，人皆慎之，殊不知下气虚乏则中焦滞实。盖肾为生气之
原，若先天气乏，不能与后天胃气相接，而喘胀生焉！故胸胁满甚，不若疏启于中，峻补于
下，乃前贤之准绳。其功有快捷方式之妙，笔不尽述，惟知脉者能悟之。且用药之法，轻则泛上
有碍，重则降下无妨。人参随下焦药，亦入下焦，不可不知。
清肺甘寒味最良，水金滋养此源长，如加辛燥纯凉剂，便使真元气自伤。肺为五脏华盖
，统摄诸气，营运不息，乃至清之分，秋毫难犯。所最畏者火也，苟或心有伤感，以致肺中火动
，中焦之气必伤，而咳血嗽痰之患作矣。夫金受火制，则无健运之能，而百病生焉。药宜甘
寒滋养，使子母相生，不受火形，其气自清，乃为良法。辛燥纯凉之剂，不宜轻用，用之稍
过，则反伤其气。必须察其脉之虚实，脉如不足，虽有痰血，亦宜温补真元，切忌寒凉。凡
衄血吐血，势未甚者，当行从治，补中益气汤，加麦冬、五味之类为宜。若用寒凉，理无是
处。（炳章按∶抄本多干姜肉桂。）
外感风寒咳嗽，身多发热头疼，或兼火郁在诸经，发散轻扬以定。四时感冒风寒，时行
疫证，实非真伤寒。初感则入于太阴肺经，故咳嗽，痰多鼻塞，或头疼发热，状似伤寒。（钱本
作“有似外感重而内伤相夹者一样。”）不可遽用甘辛发汗，但当察其脉之虚实，验其证之
有余，以轻剂兼风药引而扬之，如葛根、升麻、荆芥之类，参苏饮之属，或兼火郁，少加清
“塞因”治疗法的精妙之处难以传授，其关键在于疏通中焦阻滞的同时峻补下焦。若能透彻理解这一道理，谁说医道不能通神呢？塞治之法，严重时令人惊骇耳目，确实很难掌握！人们常说气虚不能用补法，对此都很谨慎，却殊不知当下焦气虚匮乏时，会导致中焦气机滞塞实证。因为肾是生气之源，如果先天元气匮乏，无法与后天的胃气相接，就会产生喘胀之症！所以胸胁胀满严重时，不如在中焦进行疏泄引导，在下焦进行峻补，这是前贤确立的准则。这种方法有快捷奇妙的功效，笔墨难以详尽叙述，只有精通脉诊的人才能领悟。况且用药的法度，药力轻则可能上浮受阻，药力重则下行无妨。人参配合下焦的药物使用，也能进入下焦，这一点不可不知。
清肺宜用甘寒性质的药物最为良好，水（肾）金（肺）相生滋养，此本源方能长久。如果加入辛温燥烈或纯寒凉的药剂，就会损伤人体的真元之气。肺为五脏的华盖，统摄诸气，运行不息，属于至清的部位，连秋毫般细微的病邪都难以侵犯。肺最畏惧的是火邪，倘若内心有所伤感，导致肺中火动，中焦之气必然受伤，从而引发咳血、嗽痰的病患。金（肺）受火克制，就失去了健运的功能，百病由此而生。用药宜用甘寒滋养之品，使子母（肺肾）相生，不受火热之形影响，肺气自然清肃，这才是良法。辛温燥烈和纯寒凉的药剂，不宜轻易使用，使用稍有过量，反而会损伤正气。必须观察脉象的虚实，如果脉象不足，即使有痰血症状，也适宜温补真元，切忌使用寒凉药物。凡是鼻衄、吐血，病情尚未严重的，应当采用从治法（顺从疾病假象而治），服用补中益气汤，加入麦冬、五味子等为宜。如果使用寒凉药物，在理法上是错误的。（炳章按：抄本中多记载干姜、肉桂。）
外感风寒引起的咳嗽，身体多有发热头痛，或者兼有火郁在各条经络，需用轻扬发散的方法以平息。四季感冒风寒，以及时行疫病证候，其实并非真正的伤寒。初感邪气时侵入太阴肺经，所以出现咳嗽、痰多鼻塞，或者头痛发热，症状类似伤寒。（钱本作：“有似外感重而内伤相夹者一样。”）不可立即使用甘辛发汗的方法，只应当察验脉象的虚实，验证证候的有余与否，用轻剂配合风药引导并升扬宣散，如葛根、升麻、荆芥之类，参苏饮这类方剂，或者兼有火郁时，少量加入清热……
The subtlety of the "Tonification for Obstruction" (Sai Yin) method is difficult to transmit; it involves unblocking the middle while simultaneously applying vigorous tonification. If one can thoroughly comprehend this principle, who would say that the medical art cannot reach divine proficiency? The treatment of obstruction can be so drastic as to startle the senses, truly a difficult matter! People generally exercise caution regarding the notion that "Qi deficiency should not be treated with tonification," yet they fail to realize that when Qi in the lower jiao (Lower Burner) is deficient and exhausted, it leads to stagnation and excess in the middle jiao (Middle Burner). The Kidney (Shen) is the source of generating Qi; if congenital Qi is insufficient to connect with postnatal Stomach Qi, wheezing and distension arise. Therefore, when chest and hypochondriac fullness are severe, it is better to unblock and guide from the middle and vigorously tonify from the lower, which is the standard set by former sages. This method possesses the wonder of rapid efficacy, which cannot be fully described in writing; only those who understand pulse diagnosis can grasp its essence. Furthermore, regarding the method of medication: if the medicinal force is light, it may face obstacles floating upward; if heavy, descending downward causes no harm. When Ginseng Radix et Rhizoma (Renshen) is used with herbs for the lower jiao, it also enters the lower jiao; this must not be overlooked.
For clearing the Lung, sweet-cold flavor herbs are best; nourishing Water (Kidney) and Metal (Lung) prolongs this source. If pungent-drying or purely cold agents are added, the true primordial Qi will be injured. The Lung is the canopy of the five zang organs, governing all Qi, operating ceaselessly, belonging to the realm of utmost purity, where even the finest down is hard to offend. What it fears most is Fire. If emotional distress causes Fire to stir within the Lung, the Qi of the middle jiao will inevitably be damaged, leading to conditions such as hemoptysis and coughing with phlegm. When Metal is controlled by Fire, it loses its ability to transport and transform, giving rise to myriad diseases. Medications should be sweet-cold and nourishing, allowing the mother-son relationship (Metal-Water/Lung-Kidney) to generate each other, avoiding the form of Fire, so that Lung Qi naturally clears; this is the excellent method. Pungent-drying and purely cold agents should not be used lightly; slight overuse will damage Qi. One must examine the pulse for deficiency or excess. If the pulse indicates insufficiency, even if there is phlegm or blood, warm tonification of primordial Qi is appropriate, and cold medicines must be strictly avoided. For epistaxis or hematemesis where the condition is not severe, one should employ the "following treatment" method (treating according to the apparent nature of the disease), using Bu Zhong Yi Qi Tang (Supplement the Middle and Augment the Qi Decoction) with additions such as Ophiopogonis Radix (Maidong) and Schisandrae Fructus (Wuweizi). Using cold medicines in this context is theoretically incorrect. (Bingzhang notes: Manuscripts often record Gingeris Rhizoma Recens (Ganjiang) and Cinnamomi Cortex (Rougui).)
Cough caused by exogenous Wind-Cold often presents with fever and headache, or may involve Fire depression in various meridians, requiring light dispersing and ascending methods to resolve. Seasonal common colds due to Wind-Cold and epidemic patterns are not true Shanghan (Cold Damage). Initially, pathogens enter the Taiyin Lung Meridian, causing cough, excessive phlegm, nasal congestion, headache, and fever, resembling Shanghan. (Qian's version reads: "Resembling a case of severe exterior pathogen complicated by interior injury.") One should not hastily use sweet-pungent sweating methods; instead, one must examine the pulse for deficiency/excess and verify the syndrome for excess/deficiency, using light agents combined with wind-dispelling herbs to guide and ascend, such as Puerariae Lobatae Radix (Gegen), Cimicifugae Rhizoma (Shengma), and Schizonepetae Spica (Jingjie), or formulas like Shen Su Yin (Ginseng and Perilla Decoction). If Fire depression is present, add small amounts of heat-clearing...