人配天地，而称三才，人身俨然一小天地也。凡两间之理，无所不应，他不具论，即如脉之合
于五行者，粲若指掌请得而陈之。北方为坎，水之位也。南方为离，火之位也。东方为震，木之
位也。西方为兑，金之位也。中央为坤，土之位也。试南面而立，以观两手之部位。心属火居寸，
亦在南也。肾属水居尺，亦在北也。肝属木居左，亦在东也。肺属金居右，亦在西也。脾属土居
关，亦在中也。以五行相生之理言之，天一生水，故先从左尺肾水生左关肝木，肝木生左寸
心火。心火为君主，其位至高不可下，乃分权于相火。相火寓于右肾，肾本水也，而火寓焉。如
龙伏海底，有火相随。右尺相火生右关脾土，脾土生右寸肺金，金复生水，循环无端，此相生
之理也。更以五行相克之理言之，相火在右尺，将来克金，赖对待之左尺，实肾水也。火得水
制，则不乘金矣。脾土在右关，将来克水，赖对待之左关，实肝木也，土得木制，则不侮水矣。肺
金在右寸，将来克木，赖对待之左寸，实心火也，金得火制，则不贼木矣。右手三部，皆得左手
三部制矣，而左手三部竟无制者，独何欤？右寸之肺金，有子肾水可复母雠。右关之脾土，有
子肺金可复母雠。右尺之相火，有子脾土可复母雠。是制于人者仍可制人，相制而适以相
成也。此相克之理也。人诚能体天地之道以保其身，脉何有不调者哉。
人与天地相配，被称为“三才”，人体俨然就是一个小天地。宇宙间的所有道理，在人体中都有相应的对应，这里不再一一列举，就拿脉象与五行相合这一点来说，清晰得就像看自己的手掌一样，请让我详细陈述。
北方属于坎卦，是水的方位。南方属于离卦，是火的方位。东方属于震卦，是木的方位。西方属于兑卦，是金的方位。中央属于坤卦，是土的方位。试着面向南站立，来观察双手脉诊的部位。心脏属火，位于寸部（腕横纹处），也在南方。肾脏属水，位于尺部（靠近肘端处），也在北方。肝脏属木，位于左手，也在东方。肺脏属金，位于右手，也在西方。脾脏属土，位于关部（寸与尺之间），也在中央。
从五行相生的原理来说，天一生水，所以先从左尺部的肾水生发至左关部的肝木，肝木又生发至左寸部的心火。心火作为君主之官，其位置至高无上不可下行，于是将权力分给相火（命门之火）。相火寄寓于右肾，肾脏本属水，但火寄寓其中。这就像龙潜伏在海底，有火随之伴随。右尺部的相火生发右关部的脾土，脾土又生发右寸部的肺金，肺金再复生水，循环往复没有尽头，这就是相生的原理。
再从五行相克的原理来说，相火位于右尺部，将来会克制肺金，幸好有相对待的左尺部实为肾水。火得到水的制约，就不会乘袭（过度克制）肺金了。脾土位于右关部，将来会克制肾水，幸好有相对待的左关部实为肝木，土得到木的制约，就不会侮逆（反向克制）肾水了。肺金位于右寸部，将来会克制肝木，幸好有相对待的左寸部实为心火，金得到火的制约，就不会贼害（过度克制）肝木了。右手的三部脉，都受到左手三部脉的制约，而左手的三部脉竟然没有制约它们的，这是为什么呢？右寸部的肺金，有子脏肾水可以报复母脏的仇敌（即水克火，间接保护金不受火克，或指金生水，水制火以救金）。右关部的脾土，有子脏肺金可以报复母脏的仇敌（即金克木，间接保护土不受木克，或指土生金，金制木以救土）。右尺部的相火，有子脏脾土可以报复母脏的仇敌（即火生土，土制水以救火）。这样，被他人制约的也可以制约他人，相互制约反而成就了整体的平衡。这就是相克的原理。人如果能体悟天地的规律来保养自己的身体，脉象怎么会有不调和的呢？
Humans are matched with Heaven and Earth, collectively known as the "Three Powers" (San Cai), and the human body is essentially a microcosm of the universe. All principles governing the cosmos correspond to those within the human body; without discussing them all, let us examine how pulse diagnosis aligns with the Five Elements (Wu Xing), which is as clear as looking at one's own palm. I shall elaborate on this.
The North corresponds to the Kan trigram, representing the position of Water. The South corresponds to the Li trigram, representing the position of Fire. The East corresponds to the Zhen trigram, representing the position of Wood. The West corresponds to the Dui trigram, representing the position of Metal. The Center corresponds to the Kun trigram, representing the position of Earth. Imagine standing facing south to observe the positions of the pulses in both hands. The Heart belongs to Fire and resides in the Cun position (inch position, near the wrist crease), which is also in the South. The Kidneys belong to Water and reside in the Chi position (cubit position, further up the arm), which is also in the North. The Liver belongs to Wood and resides on the left side, which is also in the East. The Lungs belong to Metal and reside on the right side, which is also in the West. The Spleen belongs to Earth and resides in the Guan position (bar position, between Cun and Chi), which is also in the Center.
Speaking from the perspective of the generating cycle (Sheng) of the Five Elements: "Heaven generates One with Water." Thus, it begins with Kidney Water at the Left Chi position generating Liver Wood at the Left Guan position, and Liver Wood generating Heart Fire at the Left Cun position. Heart Fire, as the Sovereign Lord, occupies the highest position and cannot descend; therefore, it delegates authority to Ministerial Fire (Xiang Huo). Ministerial Fire resides in the Right Kidney. Although the Kidney fundamentally belongs to Water, Fire resides within it. This is like a dragon lurking at the bottom of the sea, accompanied by fire. Ministerial Fire at the Right Chi position generates Spleen Earth at the Right Guan position, and Spleen Earth generates Lung Metal at the Right Cun position. Lung Metal then generates Water again, cycling endlessly. This is the principle of generation.
Furthermore, speaking from the perspective of the controlling cycle (Ke) of the Five Elements: Ministerial Fire is at the Right Chi position and will eventually control Metal. Fortunately, the opposing Left Chi position contains substantial Kidney Water. When Fire is controlled by Water, it does not over-control (Cheng) Metal. Spleen Earth is at the Right Guan position and will eventually control Water. Fortunately, the opposing Left Guan position contains substantial Liver Wood. When Earth is controlled by Wood, it does not insult (Wu) Water. Lung Metal is at the Right Cun position and will eventually control Wood. Fortunately, the opposing Left Cun position contains substantial Heart Fire. When Metal is controlled by Fire, it does not rob (Zei) Wood. The three positions on the right hand are all controlled by the three positions on the left hand, yet the three positions on the left hand seem to have no controllers. Why is this? Lung Metal at the Right Cun position has its offspring, Kidney Water, which can avenge its mother's enemy (by controlling Fire). Spleen Earth at the Right Guan position has its offspring, Lung Metal, which can avenge its mother's enemy (by controlling Wood). Ministerial Fire at the Right Chi position has its offspring, Spleen Earth, which can avenge its mother's enemy (by controlling Water). Thus, those who are controlled can also control others; mutual control serves to mutually complete each other. This is the principle of control. If humans can embody the Dao of Heaven and Earth to preserve their bodies, how could the pulse be disordered?