人火分明势缓然，寒凉灭伏药相兼，两途虚实应须别，莫使差讹致倒颠。经云∶微者逆
之。
也。（张东扶曰∶心之真阴伤，然后君火炽，用寒以益心，非为心属火而用凉以折之也。亦
救其心之真阴而火自静耳。）且真阴藏于离宫，故曰神阴。与相火治法大相远矣。（复言可以
用寒之故，张东扶曰∶火旺于南，南，离也，心也，而真火实生于肾。水旺于北，北，坎也
，肾也，而真水实生于心。）名虽曰逆，实正治之法也。
龙火飞腾大速，遇寒光焰滔天，惟其推折势难兼，邪退正随
管见。（钱本作“难将凉剂
经云∶甚者从之，从者，从其性也。盖龙火者，相火也，其势大烈，不可水灭湿折，从
其性而伏之，惟桂、附、姜之属，可以治之。庸工不识此理，凡见火病，不分阴阳，不辨虚实，
确谓知母黄柏，独能补肾滋阴，不知阴气化火，火势愈强，是不明龙雷之性，逆从之道也。
（末二句钱本作“真阴在坎，却与心火同治”，谬矣。）
呕逆声频气有余，欲餐难入费踌躇，寒因热用无他技，姜制栀连倍竹茹。求者，求心火
之有余也。盖心为君火，不戢则自焚，自焚则死。况真精所藏之位，性喜寒而恶热。太仆云∶寒
以益心，诚哉是言也。又云∶呕逆生而食不得入，有火之病，宜求所谓寒因热用，是其法也
人火（指君火，即心火）的势态虽然分明但相对缓和，治疗时应当寒凉药物与灭伏之法相结合。这两种途径必须辨别虚实，不要使诊断错误导致病情颠倒恶化。《内经》说：病势轻微的，采用逆其病性而治的方法。（张东扶说：心的真阴受损，然后君火才会炽盛，使用寒凉药是为了益护心之真阴，并非因为心属火就用凉药来折损它。这也是在救治心的真阴，真阴得救则火自然安静。）况且真阴藏于离宫（心），所以称为神阴。这与相火的治法大不相同。（再次说明可以用寒凉药的原因，张东扶说：火旺于南方，南对应离卦，即心脏；而真火实际上生于肾。水旺于北方，北对应坎卦，即肾脏；而真水实际上生于心。）名义上叫做“逆”，实际上是正治（逆治）的方法。
龙火（指相火，因其势如龙雷般猛烈）飞腾迅速，遇到寒凉反而光焰滔天，只有推折其势才难以兼顾，邪气退去正气随之恢复。（钱本将“难兼”作“难将凉剂”，意为难以单纯使用凉剂）。《内经》说：病势严重的，采用顺从其病性而治的方法。“从”，就是顺从其本性。所谓龙火，就是相火，其势非常猛烈，不可用水湿来灭折，只能顺从其本性使其潜伏，只有桂枝、附子、干姜这类药物可以治疗它。庸医不认识这个道理，凡是见到火病，不分阴阳，不辨虚实，固执地认为知母、黄柏能单独补肾滋阴，不知道阴气化火后，火势会更加强盛，这是不明白龙雷之火的本性，也不懂逆治与从治的道理。（最后两句钱本作“真阴在坎，却与心火同治”，这是错误的。）
呕吐逆气声音频繁且气有余（实证），想吃却难以下咽令人犹豫不决，治疗方法没有别的技巧，就是用寒因热用的方法，方用生姜炮制的栀子、黄连，加倍竹茹。所谓“求”，是求取心火有余的病机。因为心为君火，如果不加节制就会自焚，自焚则死。何况真精所藏的部位（心），本性喜欢寒凉而厌恶热邪。太仆（指李中梓，曾任太仆寺卿）说：用寒凉药来益护心脏，这句话说得确实正确。他又说：呕吐逆气产生且食物不能进入，是有火邪的疾病，适宜采用“寒因热用”的方法，这就是正确的治法。
The fire of humanity (Jun Fire, i.e., Heart Fire) presents with a distinct but relatively mild momentum; treatment should combine cooling herbs with methods to subdue it. The two approaches must be distinguished by deficiency and excess, lest diagnostic errors lead to reversed pathology. The Classic states: "For minor conditions, treat contrary to the disease nature." (Zhang Dongfu stated: When the true Yin of the Heart is injured, Jun Fire becomes blazing. Using cold herbs benefits the true Yin of the Heart; it is not because the Heart belongs to Fire that one uses cool herbs to suppress it. This is also saving the true Yin of the Heart, so that when the true Yin is restored, the Fire naturally calms.) Moreover, true Yin resides in the Li Palace (Heart), hence it is called Shen Yin. This differs greatly from the treatment of Xiang Fire (Ministerial Fire). (Explaining again why cold can be used, Zhang Dongfu stated: Fire prospers in the South, which corresponds to the Li trigram and the Heart; yet true Fire actually originates from the Kidney. Water prospers in the North, corresponding to the Kan trigram and the Kidney; yet true Water actually originates from the Heart.) Although named "contrary," it is essentially the method of orthodox treatment (treating contrary to the disease nature).
Dragon Fire (Xiang Fire) ascends rapidly; encountering cold makes its flames roar like the sky. Only by pushing back its momentum can it be managed, as simply using cold agents is difficult to balance; once evil recedes, healthy Qi follows. (Qian's edition reads "difficult to use cold decoctions" instead of "difficult to manage together"). The Classic states: "For severe conditions, treat according to the disease nature." "According to" means following its nature. Dragon Fire refers to Ministerial Fire, whose momentum is extremely fierce and cannot be extinguished by water or dampness. One must follow its nature to subdue it; only herbs such as Guizhi Tang (Cinnamon Twig Decoction) components like Cinnamomi Ramulus (Guizhi), Aconiti Lateralis Radix Praeparata (Fuzi), and Zingiberis Rhizoma (Ganjiang) can treat it. Quack doctors do not understand this principle. Whenever they see fire diseases, without distinguishing yin/yang or deficiency/excess, they firmly believe that Anemarrhenae Rhizoma (Zhimu) and Phellodendri Cortex (Huangbai) alone can tonify Kidney Yin. They do not know that when Yin qi transforms into fire, the fire intensity increases further. This shows ignorance of the nature of Dragon-Thunder Fire and the principles of contrary and compliant treatment. (The last two sentences in Qian's edition read "True Yin is in Kan, yet treated together with Heart Fire," which is erroneous.)
Frequent retching with excessive Qi (excess syndrome), desiring food but unable to swallow causes hesitation. There is no other skill than using cold for heat (treating heat with cold drugs administered hot), employing Gardeniae Fructus (Zhizi) processed with Ginger, Scutellariae Radix (Huanglian), and doubling the dosage of Bambusae Folium (Zhuru). "Seeking" refers to seeking the excess of Heart Fire. Since the Heart is Jun Fire, if unchecked it will self-combust, leading to death. Moreover, the location where true essence resides (the Heart) naturally prefers cold and dislikes heat. Taipu (Li Zhongzi) said: "Using cold to benefit the Heart" is indeed correct. He also said: "When retching arises and food cannot enter, it is a disease of fire; one should seek the method of 'using cold for heat,' which is the proper approach."