Mencius said, “When Confucius ascended Mount Dong, the state of Lu seemed small to him; when he ascended Mount Tai, the entire world seemed small to him. Therefore, for one who has seen the ocean, other waters are no longer impressive; for one who has studied at the gate of a sage, other words are no longer appealing.
There is a method to observing water: one must observe its great waves. The sun and moon possess brilliance, and their light must penetrate even the tiniest crevices. As for flowing water, it will not advance until it has filled every hollow along its path; similarly, a gentleman who aspires to the Way will not achieve true mastery until he has accumulated enough to form a coherent pattern.”
Note
This passage from the Jin Xin I chapter of the Mencius uses vivid metaphors to discuss “elevating one’s realm,” “broadening one’s vision,” and “methods of scholarly and moral cultivation.” Drawing on traditional commentaries and historical context, we can understand its underlying thought through the following dimensions:
- Realm Determines Vision: The Perspective of “Ascending Mount Tai Makes the World Seem Small”
Mencius uses Confucius climbing a mountain as an example to illustrate the philosophy that “height determines vision.” When Confucius climbed Mount Dong and Mount Tai, the mountains did not shrink; rather, his personal realm expanded. During the Warring States period, scholars were often confined to the interests of a single state or personal gain. Mencius used this to point out that only by continuously climbing the peaks of morality and scholarship can one transcend narrow secular prejudices and possess a grand perspective that embraces the world. This also explains why “for one who has studied at the gate of a sage, other words are no longer appealing” – after witnessing the supreme Way of the sage, ordinary and shallow words naturally fail to impress. - Exploring the Essence of Things: “Observing Water Requires a Method: One Must Observe Its Great Waves”
Mencius proposed an “ocean-viewing” methodology with profound aesthetic and philosophical significance. “Great waves” represent the vitality and majestic momentum of water. Mencius believed that one should not merely look at the calm surface of the water, but observe its magnificent inner strength. Applied to scholarship and understanding people, this means seeing through phenomena to grasp the essence, and experiencing the endless, magnificent spiritual core behind things (or the Way of the sage). At the same time, “their light must penetrate even the tiniest crevices” illustrates that the Great Way (the brilliance of the sun and moon) universally illuminates all things meticulously. - The Theory of Gradual Cultivation: “Not Advancing Without Filling Hollows, Not Achieving Mastery Without Forming a Pattern”
This is Mencius’ earnest teaching to scholars. “Ke” refers to hollows or depressions. When flowing water encounters a hollow, it must first fill it before continuing forward; it will never leap across empty space. A gentleman pursuing the Way is the same: he must take steady steps, accumulating knowledge and virtue to a certain degree until it forms a coherent pattern and scale (“cheng zhang”), before he can achieve a state of comprehensive mastery (“da”). Mencius used this to strongly criticize the impetuous and overly ambitious academic trends of his time, emphasizing the objective laws of “accumulating deeply to burst forth later” and “progressing step by step.”
孟子曰：“孔子登东山而小鲁，登泰山而小天下。故观于海者难为水，游于圣人之门者难为言。观水有术，必观其澜。日月有明，容光必照焉。流水之为物也，不盈科不行；君子之志于道也，不成章不达。”
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