Mencius and Xunzi were prominent Confucian philosophers who lived during the Warring States period in ancient China. Despite their common interest in Confucian virtues, moral cultivation, and rulership, their views on human nature diverged significantly. Mencius believed in the inherent goodness of human nature, which he argued could be developed through the cultivation of innate moral virtues. In contrast, Xunzi asserted that human nature was inherently bad and required strict moral education and regulations to improve. This essay aims to analyze the philosophical arguments of Mencius and Xunzi, explore the similarities and differences in their views on human nature, and evaluate the significance of their ideas in the context of Confucian thought and beyond.
I will first examine Mencius’ views on human nature and compare them with Xunzi’s perspective. In his work, Mengzi, Mencius employed a series of analogies to illustrate his argument for human nature. Following his approach, I will provide a thorough explication of the logics of his analogical reasoning.
To begin, I will delve into Mencius’ assumptions regarding human nature. Firstly, Mencius asserts that human nature is universal to all human beings. To support this claim, he uses an analogy of barley, which is a kind of plant that inherently develops into grain, regardless of the various environmental conditions that affect its growth[1]. This, he argues, is indicative of a broader phenomenon – natural kinds[2]. From this analogy, Mencius argues that human beings are also a natural kind and share similar characteristics by nature. Although humans may differ in their tastes, preferences, and abilities, these differences are shaped by external environments and experiences, and do not reflect the essential nature of human beings.
Secondly, Mencius argues that human nature is unique to humans, as it distinguishes them from all other animals. He states that “the nature of a dog cannot be the same as the nature of a cow, just as the nature of a cow cannot be the same as the nature of a human[3].” Based on this assumption, he rejected the idea that the desire for food and sex is part of human nature, for the reason that these are not unique to humans. He further argued that humans are different from other animals because of their pursuit of humanity and righteousness, which origins from their innate potential for moral virtues, a capacity of the human heart/mind[4]. Since the heart/mind is a biological organ that comes with birth and possessed by all humankinds, its capacity must be part of the human nature. Thus, to Mencius, the innate potential of morality is a universal nature of all human beings. This leads to his claim that “there is no man who is not good; there is no water that does not flow downward[5].” Just as water has a natural inclination to flow downward, humans also possess an innate tendency that guides their actions and decisions toward goodness.
To substantiate his claim of inherent human goodness, Mencius further explores the connection between the heart/mind and morality. He asserts that the capacity of moral virtues origins from the innate feelings of our heart/mind. Mencius argues that suppose when someone witnesses a young child in danger of falling into a deep well, they experience a natural sense of anxiety and concern for the child. This response is not driven by a desire to win favor from the child’s parents, gain recognition from others, or an aversion to hearing the child’s cries, but by a feeling of compassion and empathy, which makes humans intolerable to the suffering of others[6]. This shows that human heart/mind is naturally a “heart of compassion[7],” which is, as Mencius claims, the beginning of a fundamental moral virtue – humanity.
Thus, according to Mencius, human beings are believed to be inherently good due to their possession of unique moral sprouts that are not found in other animals. These moral sprouts are primarily generated from the innate feelings of empathy and compassion within our mind and heart. This implies that humans are born with a natural inclination towards morality, leading Mencius to conclude that they are naturally good.
However, a question arises: if humans have a natural tendency towards goodness and if all individuals possess the seeds of morality within them, then why aren’t sages abundant everywhere? While Mencius advocates for the existence of moral sprouts, he does not hold a naive view of the moral reality of humans. Just like a sprout, there are two possibilities: it can either bear abundant fruit when carefully nurtured by humans or it may wither away, unable to withstand the adversities of a harsh environment.
Mencius acknowledges the potential for moral failures. To explain these failures, he specifically argues that our mind and heart serve as the sources of our moral virtues, while our sensory organs such as our ears, eyes, and mouth act as sources of our sensory desires. Mencius refers to our mind and heart as the “major part[8]” of our being, while considering the sensory organs as the “minor part[9].” Since the “minor part” lacks the ability to think and reflect like the “major part,” it can influence us to deviate from the moral path. Mencius attributes most cases of moral failure to excessive attention given to our sensory desires, neglecting the functions of our mind.
To address this moral failure, Mencius proposes that the goal of moral education is to focus on reducing the influence of our sensory desires and cultivating our mind. By doing so, we develop the right “qi[10],” a form of moral spirit that will be manifested in our appearance and daily actions.
On the surface, Xunzi seems to hold a directly opposite view of Mencius, as he says: ” People’s nature is bad. Their goodness is a matter of deliberate effort.[11]” However, upon closer examination of Xunzi’s overall moral theory, one might realize that it could be difficult to pinpoint their exact points of disagreement. Since Mencius views our mind/heart as the foundation of morality, let’s first examine how Xunzi views it.
Xunzi believes that our body is composed of two parts: “the heavenly faculties[12],” which consist of our sensory organs, such as eyes, ears, nose, mouth, and body. The function of our heavenly faculties is to detect and observe the properties of natural objects and the outside world. Apart from our sensory organs, Xunzi argues that another part of our body is our mind/heart, which he calls “the heavenly ruler[13].” The mind/heart is a ruler because it “controls[14]” our sensory organs in two ways: first, our mind processes all of our sensory data and forms overall conceptions of the objects we perceive; secondly, our mind/heart is able to be “rid of” the biases and desires that arise from our senses and guide us towards moral composure[15].
By examining Xunzi’s construction of the mind and body, it appears that Xunzi and Mencius share a similar view on this subject. They both agree that our mind/heart is the superior faculty to our senses, and it is able to regulate our sensory desires and enable us to make moral judgments. While they may differ in their views of human nature, both philosophers recognize the importance of the mind/heart in developing morality. This shared understanding suggests that the differences in their moral theories may not be as stark as they initially seem, opening up further avenues for comparative analysis.
Next, let’s look at how Xunzi defines human nature: “Human nature is what is accomplished by heaven. It is something which cannot be learned and to which one cannot apply oneself[16].” What one has at birth are basically one’s biological characteristics, such as our sensory organs, which are not so different from those of other animals. The direct contrast to this definition of human nature is wei[17], which is defined as “That in man of which he can become capable through learning.[18]”
Thus, at this point in his argument, Xunzi has not yet said that human nature is bad, but he is saying that human nature is amoral since morality is not what we are born with. However, even Mencius would somehow agree with this point since, as I have pointed out, Mencius claims that humans are merely born with a moral tendency. To fully realize our moral potential, one has to constantly cultivate one’s mind/heart. However, Xunzi argues that “emotions are the content of human nature” because “love, hate, joy, anger, sorrow, or happiness[19]” are the responses of our mind/heart to the sensory data we receive through our biological organs.
Based on this definition of human nature, Xunzi claims that the following argument can be made: in response to our emotions, our desires develop. As our desires grow and since there isn’t any part of our nature that can constrain it (although our mind/heart is capable of exercising control, such ability is not part of our nature since it requires conscious efforts), it grows endlessly. The amount of resources presented in a society is limited. If everyone indulges in their material desires, they will soon be fighting each other for things, which will lead society into chaos and ruins. Since following our nature will lead to chaos and disorder, human nature is naturally bad.
We have now arrived at the end of Xunzi’s argument about human nature. To avoid the disastrous consequences of our unrestrained nature requires the deliberate efforts (wei) of our mind to control our desires. Among human beings’ deliberate efforts, Xunzi lists rites and rituals, moral principles and moral teachings, laws, and regulations, etc. What deliberate effort accomplishes are all forms of moral conduct and moral sentiments. The whole process of human civilization acts against man’s innate desire to aggrandize his possession and gratify his senses. Therefore, Xunzi declares, the goodness of human beings is the result of their deliberate effort.
Therefore, as I argue that Xunzi and Mencius in fact agree with each other in many aspects. First, both Xunzi and Mencius agree that our mind/heart is able to control our inborn desires and is the basis for morality. Secondly, both Xunzi and Mencius agree that although humans have the capability to be morally good, such capability is not realized at birth. Thirdly, they agree that morality cannot be fully developed without the help of conscious moral cultivation.
The main points of disagreement are that Xunzi rejects that we have innate moral sprouts since, to him, our nature is what we are born with, which refers to our physical and biological characteristics. If we are inherently good as Mencius said, then everyone should be born as a sage. Based on the definition of human nature, Mencius considers moral education as a deliberate effort, and the consequence of that will not be part of our nature.
Based on the comparisons, I argue that the differences between Xunzi and Mencius primarily stem from their distinct definitions of human nature, rather than genuine disagreements on the overall moral theory. As a result, despite their theoretical divergence, Mencius and Xunzi share many commonalities in practice, and both are considered inheritors of Confucianism.
Having established a comparison between Mencius and Xunzi, I would like to offer some personal thoughts and reflections on the philosophical debates between the two, particularly regarding human nature.
Firstly, it is important to note that Mencius did not blindly argue for innate human goodness but instead emphasized the potential for goodness within each individual. This perspective, in essence, is not too far from Xunzi’s argument, which also acknowledges the possibility of cultivating morality through deliberate effort.
Secondly, I think Xunzi’s argument is somewhat limited in its scope. By focusing primarily on what we are born with, it leaves little room for discussion on the development of human potential beyond our innate characteristics. This narrow focus may hinder a more comprehensive understanding of human nature and morality.
Third, the notion of human nature being solely defined by what we are born with could be challenged. For example, as children, most of us are not yet capable of complex logical reasoning. However, some modern cognitive scientists have discovered brain networks that endow humans with superior reasoning skills. These skills may not be readily apparent at birth but could emerge as we grow and develop. In light of this, should we not consider the capacity for logical reasoning as part of our human nature, even if it is not fully manifested at birth?
This observation presents a significant challenge to Xunzi’s theory, which posits that human nature is limited to our innate characteristics. By reevaluating the concept of human nature to include not only what we are born with but also our potential for growth and development, we may arrive at a more nuanced understanding of both Mencius and Xunzi’s arguments.
References:
Legge, James, “孟子 – Mengzi.” Chinese Text Project, Simplified Chinese version, ctext.org/mengzi/ens.
Hutton, Eric L. Xunzi: The Complete Text. Princeton University Press, 2014. JSTOR, https://doi.org/10.2307/j.ctt6wq19b. Accessed 1 May 2023.
- Mencius, 11A:7 ↑
- lei/类 ↑
- Mencius, 11A:3 ↑
- Xin/心 ↑
- Mencius, 11A:2 ↑
- Mencius, 3A:6 ↑
- 恻隐之心, ibid. ↑
- 大体, Mencius, 11A:14 ↑
- 小体,ibid. ↑
- 浩然之气, Mencius, 3A:2 ↑
- Xunzi, chapter 23; Hutton, p. 248 ↑
- 天官; Xunzi, chapter 17; Hutton, p. 176 ↑
- 天君; Xunzi, chapter 17; ibid. ↑
- Xunzi, chapter 17; ibid. ↑
- This is interpreted from the phrase “虛壹而靜”; Mencius, chapter 21 ↑
- Xunzi, chapter 23; Hutton, p. 249 ↑
- 伪, ibid. ↑
- ibid. ↑
- Xunzi, chapter 23; Hutton, p. 248 ↑

