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愚按造化之机。水火而已。人身之要。气血而已。气血之本元气而已。在阳为天为日为
火为
热为气为神。在阴为地为月为水为寒为血为精。阳以阴为体。阴以阳为用。无阳则阴无以生
。无阴则阳无以化。阴阳相生水火交济天人一理此本然也。周子所谓太极指神而言。神无所
不统该变化故为太极。而阴阳水火皆寓其中。乃合而未分。一气之所浑成者。而人身具有太
极。命门是也。命门为精神之舍居下丹田关元气海之际水火宅焉故精为水而属阴司于左肾神
为火而属阳司于右肾右肾为元阳之根左肾为真阴之主则皆统归于命门者也。内经虽未明指命
门
而已隐扬其义矣。奈何难经误以命门偏系右肾致后明哲辈出历诋其非。再考黄庭经有云。上
有黄庭下关元。后有幽阙前命门。是深得水火皈宿之地。近世李濒湖着命门考。张景岳作命
门辨累累千言。反复辨释。皆备阐内经未阐之旨。从此而探造化之。蕴穷万病之机便得悟从
心
解何待笔舌之。HT 也此理前贤亦叠有言。第未显敷其说故学人习而弗察盖有形易见。无形难
识固无怪其然也。吁使能知地下有雷声方悟。得春光弥宇宙。因着图说。
我考察自然造化的机理，不过是水和火罢了。人体生理的关键，不过是气与血罢了。气与血的根本在于元气。在阳的方面，表现为天、日、火、热、气、神；在阴的方面，表现为地、月、水、寒、血、精。阳以阴为形体基础，阴以阳为功能表现。没有阳，阴就无法生成；没有阴，阳就无法化生。阴阳相互滋生，水火相互济助，天人道理一致，这是事物的本然状态。周敦颐所说的“太极”，是指“神”而言。“神”无所不统摄，包罗变化，所以称为太极，而阴阳和水火都蕴含在其中，处于混合而未分开的状态，是一气浑然形成的整体。人身也具有太极，就是命门（位于两肾之间，为元气之根、精神之舍）。命门是精神和元气的居所，位于下丹田和关元穴附近，是水火的宅邸。因此，精属于水而属阴，由左肾主管；神属于火而属阳，由右肾主管。右肾是元阳的根本，左肾是真阴的主宰，但二者都统归于命门。《黄帝内经》虽然没有明确指明命门，但已经隐含阐述了其意义。可惜《难经》错误地将命门偏系于右肾，导致后世明智之士纷纷指责其非议。再考证《黄庭经》有云：“上有黄庭，下有关元，后有幽阙，前有命门。”这是深得水火归宿所在的地方。近代李时珍撰写了《命门考》，张景岳撰写了《命门辨》，长篇累牍，反复辩释，都详尽阐发了《黄帝内经》未曾阐明的旨意。从此探求造化的蕴藏，穷尽万病的机理，便能领悟从心解悟的道理，何必依赖笔墨舌辩呢？这个道理前代贤人也多次提及，只是没有显明敷陈其学说，所以学习的人习以为常而不能察觉。大概有形的东西容易看见，无形的东西难以识别，这本来就不奇怪啊。唉，如果能知道地下有雷声，才能感悟到春光弥漫宇宙。因此著图说。
I observe that the mechanism of creation lies merely in Water and Fire. The essence of the human body lies merely in Qi (Vital Energy) and Blood. The root of Qi and Blood is Yuan Qi (Original Qi). In the aspect of Yang, it manifests as Heaven, Sun, Fire, Heat, Qi, and Shen (Spirit). In the aspect of Yin, it manifests as Earth, Moon, Water, Cold, Blood, and Jing (Essence). Yang takes Yin as its substance; Yin takes Yang as its function. Without Yang, Yin cannot be generated; without Yin, Yang cannot be transformed. Yin and Yang generate each other, and Water and Fire mutually nourish each other; the principle of Heaven and Humanity is one. This is the natural state. Zhou Dunyi's concept of Taiji (Supreme Ultimate) refers to Shen (Spirit). Shen governs all and encompasses change, thus it is called Taiji, within which Yin-Yang and Water-Fire are contained, existing in a state of undifferentiated unity, formed by the浑成 (holistic integration) of a single Qi. The human body also possesses Taiji, which is Mingmen (Gate of Life). Mingmen is the residence of Spirit and Yuan Qi, located at the junction of Xiadantian (Lower Elixir Field) and Guanyuan (CV-4), serving as the dwelling place of Water and Fire. Therefore, Jing belongs to Water and Yin, governed by the Left Kidney; Shen belongs to Fire and Yang, governed by the Right Kidney. The Right Kidney is the root of Yuan Yang (Original Yang), and the Left Kidney is the master of True Yin (True Yin); yet both are unified under Mingmen. Although Huangdi Neijing (The Yellow Emperor's Classic of Internal Medicine) does not explicitly point out Mingmen, it implicitly reveals its meaning. Regrettably, Nanjing (Classic of Difficult Issues) erroneously associated Mingmen solely with the Right Kidney, leading later wise scholars to repeatedly criticize this view. Further examination of Huangtingjing (Yellow Court Scripture) states: "Above is Huangting, below is Guanyuan, behind you have Youque, in front you have Mingmen." This deeply understands the place where Water and Fire return to their source. In recent times, Li Shizhen wrote "Mingmen Kao" (Examination on Mingmen), and Zhang Jingyue wrote "Mingmen Bian" (Discussion on Mingmen), with lengthy texts repeatedly explaining and clarifying, fully elucidating the principles not expounded in Huangdi Neijing. From this, exploring the mysteries of creation and exhausting the mechanisms of myriad diseases allows one to comprehend through the mind, without relying on pen and tongue. This principle has been mentioned repeatedly by former sages, but because they did not explicitly elaborate on it, learners became accustomed to it without noticing. Generally,有形 (form/physical entities) are easy to see, while 无形 (formless/spiritual entities) are hard to recognize, so no wonder people are like this. Alas, only when one realizes there is thunder beneath the ground can one perceive that the spring light fills the universe. Therefore, I composed this diagrammatic explanation.