An In-depth Interpretation of Mencius' 'The Trees of Ox Mountain' Chapter: The Core of Innate Goodness and Cultivation of Mind and Nature
This paper takes the "The Trees of Ox Mountain" chapter from Mencius' "Gaozi" as its core text, integrating it with pre-Qin philosophical literature to deeply analyze the argumentative structure of innate human goodness, the mechanisms by which external environments harm the mind and nature, and the philosophical foundations and cultivation practices of the theory of innate goodness.

Chapter 17: The Relationship Between the Doctrine of Inherent Goodness and Political Theory — From the Ox Mountain Analogy to the Rule of Kings
Section 17.1 Political Implications of Inherent Goodness
Mencius’s doctrine of inherent goodness is not merely a proposition of moral philosophy; it has profound political implications.
If human nature is inherently good, the fundamental task of politics is not to "make people good" (as Xunzi argued for "transforming nature through artificiality"), but to "prevent people from losing their inherent goodness"—or, to create a social environment conducive to the preservation and development of goodness.
To use the analogy of the "Wood of Ox Mountain": Good governance is not forcibly planting trees on a barren mountain (using external laws and punishments to compel people to be good), but rather stopping the felling and removing the cattle and sheep (eliminating the external factors that cause people to lose their conscience), allowing the mountain wood to recover naturally.
This is the core idea of Mencius’s "Benevolent Governance" (Renzheng): Good governance is a mode of administration that is restrained, compliant with the seasons, and nurturing of life.
Note the appearance of "axes and adzes enter the mountains and forests according to the season" (fu jin yi shi ru shan lin) in Mencius (Liang Hui Wang I)—this contrasts sharply with "cut down with axes and adzes" (fu jin fa zhi) in the "Wood of Ox Mountain" chapter. Unrestrained felling leads to the depletion of timber; felling according to the season ensures that timber can be used inexhaustibly. The difference lies in "according to the season" (yi shi)—using natural resources with restraint and timing.
This contains a profound political philosophy: the tragedy of "Ox Mountain Wood" stems from unrestrained felling and grazing—the failure of political administration stems from excessive exploitation of the people and destruction of the moral environment. The Rule of Kings, conversely, is a method of governance that restrains, follows the ways of Heaven, and nurtures life.
Section 17.2 Benevolent Governance and Nurturing the People
The core of Mencius's "Benevolent Governance" is "nurturing the people" (yang min)—nurturing both their material life and their spiritual life.
Mencius (Liang Hui Wang I) records:
"If you plant mulberry trees around their five-acre dwellings, by the time they are fifty, they can wear silk. If the raising of chickens, pigs, dogs, and swine is not neglected in its proper season, by the time they are seventy, they can eat meat. If their hundred acres of fields are not taken from them at the right time, a family of five mouths will not go hungry. If you diligently attend to the education in the schools and constantly instruct them in the meaning of filial piety and brotherly respect, then those with white hair will not be seen carrying burdens on the roads. When those seventy years old eat silk and meat, and the common people are neither hungry nor cold, and yet some rulers do not attain the throne, this has never happened."
This passage describes the concrete content of "Benevolent Governance":
- Material level: Securing the people's food, clothing, shelter, and travel (five-acre dwellings, hundred-acre fields, raising of fowl and swine). This is to eliminate the "axes and adzes"—if people are free from material scarcity, they will not be forced by want to lose their conscience.
- Spiritual level: Providing education and moral guidance (attending to schools, instructing in filial piety and brotherly respect) to "nurture the sprouts"—cultivating and expanding the people's sprouts of goodness.
Using the "Wood of Ox Mountain" analogy:
- "Planting mulberry trees around their five-acre dwellings" is like planting trees on the mountain, actively increasing vegetation.
- "Not taking their fields at the right time" is like not cutting timber during the wrong season, protecting the natural growth of vegetation.
- "Attending to the education in the schools" is like assigning forest rangers to prevent cattle and sheep from eating the new shoots.
This is the implementation of "If they obtain nurture, nothing will fail to grow" at the political level—creating an environment where the sprouts of goodness can naturally flourish.
Section 17.3 Tyranny and Harming the People — Political Metaphors of "Cutting with Axes and Adzes"
Conversely, tyranny is the political realization of "cutting with axes and adzes."
Mencius (Liang Hui Wang I) records:
"If your dogs and swine eat the food of men and you do not stop them, and there are dead bodies in the ditches and roads and you do not issue orders to distribute the grain—this is to incite men to kill you. When men die, you say, 'It is not I, it is the year's harvest.' What is the difference between this and stabbing a man to death and saying, 'It is not I, it is the weapon'$28 If Your Majesty does not blame the harvest, then the people of the world will come to you."
Under tyranny, the rulers’ dogs and swine eat human food, yet there are starving bodies in the ditches. The rulers do not reflect on their governance but blame "the year's harvest"—this is like saying, "The mountain is barren not because of cutting, but because the mountain never grew trees."
Mencius sharply points out: The reason the common people starve and degenerate is not that their nature is inherently bad, but the result of tyrannical governance. Tyranny is that "axe and adze," cutting away the people's sprouts of goodness day after day.
Mencius (Li Lou I):
"The loss of the world by Jie and Zhou was the loss of their people; the loss of their people was the loss of their hearts. The Way to gain the world is to gain the people; the Way to gain the people is to gain their hearts; the Way to gain their hearts is to give them what they desire and withhold what they detest—that is all."
"To gain their hearts" (De qi xin)—to win the hearts of the people. The way to win their hearts is "to give them what they desire and withhold what they detest" (Suo yu yu zhi ju zhi, suo wu wu shi, er ye). This is the political application of "nurture"—nurturing the people's conscience.
Jie and Zhou lost the world precisely because they "lost their hearts"—not only did they fail to nurture the people’s conscience, but they harmed it with tyrannical rule. This is analogous to cutting Ox Mountain wood day after day with "axes and adzes," eventually leading to the complete depletion of the wood (the complete loss of the human heart, resulting in chaos throughout the world).
Section 17.4 "Nurturing the People" vs. "Harming the People" in Pre-Qin Political History
(A) The Rule of Yao and Shun — Models of Nurturing the People
The Book of Documents (Yao Dian) records:
"Let us examine the antiquity of the Emperor Yao: He was illustrious, accomplished, and receptive, truly modest and yielding, his radiance covering the Four Quarters, reaching to Heaven above and the Earth below. He was capable of clearly recognizing superior virtue, thereby making his nine family branches intimate. When the nine branches were harmonious, he rectified the affairs of the hundred clans. When the hundred clans were enlightened, he harmonized the myriad states."
Emperor Yao "was capable of clearly recognizing superior virtue, thereby making his nine family branches intimate" (Ke ming jun de, yi qin jiu zu)—first cultivating his own virtue, then extending it to his nine family branches, then rectifying the affairs of the hundred officials, and finally harmonizing the myriad states.
This is the process of "nurturing" from the inside out, from near to far. Yao first nurtured his own virtue ("If held, it exists"), then nurtured the virtue of his family, then the virtue of his officials, and finally the virtue of the myriad states—like planting trees starting from the base of a mountain, gradually spreading to the slopes and the summit, until the entire mountain is lush and green.
(B) The Rule of King Wen of Zhou — A Model of Nurturing the People
The Book of Songs, Major Odes (Daya, Ling Tai), states:
"We marked out the Spirit Terrace, we marked it and erected it. The common people attacked it, and in a short time it was finished. Do not hurry the marking out, and the people will come like children. The King is in the spirit park; the does repose securely. The does are plump and glossy, the white birds are fluttering. The King is in the spirit pond, and the fish leap up."
When King Wen marked out the Spirit Terrace, the people willingly came to help, completing it without urgency. In King Wen’s spirit park, deer lie down peacefully, white birds flutter, and fish leap in the pond—a scene teeming with vitality.
This is the political realization of "If they obtain nurture, nothing will fail to grow"—King Wen’s benevolent governance created an environment of vitality, and in this environment, not only did the animals thrive, but the people willingly served—this is the natural result when the sprouts of goodness are nurtured.
Note that this poem uses the word "zhuozhuo"—"The does are plump and glossy" (You lu zhuozhuo). However, this "zhuozhuo" describes the plumpness of the deer, contrasting sharply with the "zhuozhuo" (barrenness) in the "Wood of Ox Mountain" chapter. In King Wen’s park, "zhuozhuo" symbolizes the fullness of life; on Ox Mountain, "zhuozhuo" symbolizes the near extinction of life. The completely opposite meanings of the same term in different contexts precisely reveal the vast difference between "obtaining nurture" and "losing nurture."
(C) The Tyranny of Jie and Zhou — A Typical Case of Harming the People
The Book of Documents (Tang Shi) records:
"The King of Xia restrained the strength of the masses and exploited the cities of Xia. The masses became weary and uncooperative, saying: 'When will this sun perish$29 I am willing to perish with you!' The virtue of Xia was like this; now I must go to destroy it."
King Jie restrained the people's labor and exploited their wealth. The people became weary and uncooperative, even saying: "When will this sun die$30 I am willing to die with you!" The people compared King Jie to the sun, preferring mutual destruction—this is the state where the heart of the people is completely lost.
Analyzing this through the "Wood of Ox Mountain" chapter: King Jie’s tyranny was like ceaseless "cutting with axes and adzes," exhausting the people's sprouts of goodness, trust, and loyalty. The people's conscience was no longer attached to King Jie—"If the night energy is insufficient to be preserved, then one will not be far from birds and beasts." Of course, the "beasts" here do not mean the people became beasts, but that the relationship between King Jie and the people degraded to that of "hunter and prey"—the people no longer saw King Jie as a father-king, but as an enemy.