Mencius – Chapter 13.16

Mencius said, “When Shun lived in the deep mountains, dwelling among trees and stones and roaming with deer and wild pigs, there was very little difference between him and the uncultured rustics of the deep mountains. However, when he heard a single good word or saw a single good deed, his response was like a breached river, surging with such unstoppable force that nothing could hold it back.”

Note

This passage from the Jin Xin I chapter of the Mencius offers a vivid depiction of “what makes a sage a sage.” Drawing on traditional commentaries and historical context, we can understand its underlying thought through the following dimensions:

• The Common Origin of Sages and Ordinary People: Demystifying the Sage
  Mencius boldly compared the ancient sage king Shun to the “uncultured rustics of the deep mountains,” pointing out that their outward manifestations in a natural state were “very little different.” This profoundly reflects the egalitarian Confucian thought that “everyone can become a Yao or Shun.” Mencius used this to tell the world that sages are not naturally endowed, unfathomable deities; originally, they were just like ordinary people. This assertion of the “common origin of sages and mortals” greatly bridged the gap between moral cultivation and ordinary individuals, providing the theoretical possibility for anyone to attain sagehood.
• The Explosive Power of Morality: The Inner Awakening of “Like a Breached River”
  If the starting point is the same, why did Shun become a sage? Mencius provided the answer: an extreme sensitivity to “goodness” and a powerful capacity for action. “Hearing a single good word or seeing a single good deed” shows that Shun’s heart always maintained a desire and openness toward morality; while “like a breached river, surging with such unstoppable force that nothing could hold it back” vividly depicts the immense energy released when this inner conscience is awakened. True moral cultivation is not rigid suppression; rather, once the direction of goodness is recognized, it unleashes an irresistible vitality and drive for action.
• The Decisive Significance of Later Cultivation: From “Potential” to “Reality”
  This discourse perfectly connects Mencius’ “theory of innate human goodness” with his “theory of self-cultivation.” Although ordinary people (rustics) possess the potential for goodness, they often stagnate due to a lack of self-awareness and being easily obscured by their environment. The greatness of the sage (Shun) lies in his ability to remain vigilant at all times, seizing any tiny spark of goodness and infinitely expanding it. This inspires later generations: while innate human nature is identical, the subsequent “pursuit of goodness” and its “expansion” are the ultimate keys to determining a person’s final spiritual realm.

孟子曰：“舜之居深山之中，与木石居，与鹿豕游，其所以异于深山之野人者几希。及其闻一善言，见一善行，若决江河，沛然莫之能御也。”