An In-depth Interpretation of Mencius' 'The Trees of Ox Mountain' Chapter: The Core of Innate Goodness and Cultivation of Mind and Nature

Chapter 7: "That which caused the abandonment of the good heart is just like the axe and adze to the wood" — The Discourse on Abandoning the Heart

Section 7.1 "Abandoning the good heart": A Deep Analysis of Why the Conscience is Lost

"That which caused the abandonment of the good heart (fang qi liang xin) is just like the axe and adze to the wood" (Yi you suo fang qi liang xin zhe, yi you fu jin zhi yu mu ye). The reason man loses his conscience is like the axe and adze to the wood.

"Fang" means losing or letting go. Zhao Qi annotates: "Fang means loss." The abandonment of the good heart (liangxin) is not actively "giving up," but passively "losing" (fang shi)—losing it without awareness.

Why use the word "Fang" instead of words like "loss" (sang), "death" (wang), or "extinction" (mie)$20 The word "Fang" carries a sense of "scattering" or "drifting away"—the conscience is not severed by a single blow, but slowly flows away like water, or wanders off quietly like a sheep.

The Analects contains an important usage of "Fang":

The Analects (Book 4, 1st chapter) records:

The Master said: "If one acts based on profit (fang yu li er xing), one will incur much resentment." While some understand "fang" here as "modeling after," another interpretation is: if one takes profit as the standard for action (indulging in profit), one will incur much resentment.

More famously, Mencius (Gaozi II) presents the discourse on "abandoning the heart" (fang xin):

"Benevolence is the human heart; Righteousness is the human path. To abandon the path and not follow it, to let the heart go astray and not seek it—how lamentable! If a man loses his chicken or dog, he knows how to look for it; if he loses his heart, he does not know how to look for it. The Way of learning and scholarship is nothing else but seeking to recover that lost heart."

This passage draws an analogy between "fang xin" (losing the conscience) and "losing a chicken or dog" (fang ji quan). If a person loses a chicken or dog, they know to search for it; if they lose their conscience, they do not know how to search for it. Mencius laments, "How lamentable!"—how tragic that people care more about tangible possessions than their intangible conscience. Chickens and dogs are visible and concrete; their loss is immediately apparent. The conscience is invisible and abstract; its loss is gradual and subtle. People pay far more attention to tangible things than to the intangible heart—this itself shows that the human heart has already been obscured by material desires.

Section 7.2 The Precise Correspondence between the Conscience's Loss and the Wood's Felling

Mencius’s analogy of "the axe and adze to the wood" in describing the loss of conscience has an extremely precise correspondence:

Axe and Adze → Material Desire: Axes and adzes are tools for cutting wood; material desires are the forces that erode conscience. Axes and adzes are man-made artifacts; material desires are not inherent in human nature but arise from external temptations and the indulgence of the heart.

The Process of Felling → The Process of Losing Conscience: Felling is not completed in one stroke—it requires chop after chop. The loss of conscience is not instantaneous—it requires repeated indulgence, day-after-day erosion.

The Woodcutter’s Goal → The Desire-Chaser’s Goal: The woodcutter fells trees to obtain timber—his goal is not "to destroy the mountain," but "to acquire material." Those who chase material desires erode conscience not intentionally—their goal is not "to lose their conscience," but "to acquire profit." Yet, the objective result is the same: the mountain wood is depleted, and the conscience is lost.

This contains a profound philosophical insight: the reason people "abandon their conscience" is often not out of an evil motive, but out of the normal pursuit of gain—only when this pursuit is unrestrained and unchecked does it inadvertently consume the conscience. Just as the woodcutter initially only cut a few trees for material, not intending to denude the mountain, the daily process of cutting eventually leads to the mountain being stripped bare.

This idea resonates widely in pre-Qin literature. The Book of Documents (Dayu Mo):

"The human heart is perilous; the Dao heart is subtle. Only when precise and singular can one hold fast to the Mean."

"The human heart is perilous" (Ren xin wei wei)—human desire is dangerous and unstable. "The Dao heart is subtle" (Dao xin wei wei)—the human Dao heart (conscience) is subtle and easily lost. These two lines brilliantly summarize the core insight of Mencius’s "abandoning the heart" discourse: The subtlety of the Dao heart makes it extremely vulnerable to being eroded by the peril of the human heart (desire)—just as the new sprout is easily eaten by the grazing ox. The perversity of the human heart means that if one indulges it even slightly, it inflicts irreversible harm on the conscience. "Only when precise and singular can one hold fast to the Mean." This is precisely the cultivation Mencius advocates: preventing the "human heart" (desire) from running wild, nurturing the "Dao heart" (conscience), allowing it to grow and strengthen continuously.

Section 7.3 Examination of the Term "Good Heart" (Liangxin)

The term "Good Heart" (Liangxin) does not appear in literature prior to Mencius. The Analects does not use the term, nor do the Book of Documents or the Book of Songs. Mencius is likely the originator of the concept of "Liangxin."

"Liang" means good or excellent. The Shuowen Jiezi states: "Liang means goodness."

However, the character "Liang" has another important meaning in pre-Qin texts: "innate" or "original." The terms "Liangzhi" (innate knowledge) and "Liangneng" (innate ability) both carry the meaning of "original knowledge" or "original ability."

Mencius (Jinxin I) records:

"What man can do without learning is his innate ability (liang neng); what man knows without pondering is his innate knowledge (liang zhi). An infant, however young, knows to love its parents; when grown, it knows to respect its elders. To love one's relatives is Benevolence; to respect one’s elders is Righteousness. Nothing more—it is simply that these are extended throughout the world."

"Liangneng" is what can be done without learning; "Liangzhi" is what can be known without deliberation. This shows that the core meaning of "Liang" is "innate," "naturally endowed," or "not requiring subsequent cultivation or deliberation."

Therefore, the precise meaning of "Good Heart" (Liangxin) should be: "The good heart that man possesses naturally, without needing subsequent cultivation or learning." The specific manifestations of this good heart are the heart of alarm/compassion, shame/aversion, yielding/deferring, and right/wrong discernment—these moral emotions are not learned but naturally endowed.

The fact that it is called "Liang" (Good) also carries another layer of meaning: it is not just any psychological state, but the best and most original state of the human heart. The human heart has various states—the heart of desire, the heart of fear, the heart of jealousy, the heart of anger—but "Liangxin" is the most fundamental, original state of the heart. Other psychological states are variations of "Liangxin" formed under the influence of external factors.

This idea resonates with the Great Learning (Daxue):

"The Way of the Great Learning lies in manifesting the luminous virtue (ming ming de), in loving the people (qin min), and in resting in the utmost good (zhi yu zhi shan)."

"Luminous Virtue" (Mingde) refers to the innate bright virtue possessed by man—this corresponds to Mencius’s "Liangxin." "Manifesting the luminous virtue" (ming ming de) means making manifest the innate bright virtue—this corresponds to Mencius’s "seeking the lost heart" (qiu fang xin). The reason "luminous virtue" needs to be "manifested" is that it has been obscured (like the mountain wood being completely cut down, the conscience lost). But the "luminous virtue" itself has not vanished, only obscured, so it can be revealed again through "manifestation" (cultivation).