📖 Meaning
Describes the moment when someone's mind suddenly opens up and they immediately grasp a truth or principle they had previously failed to understand. The image is of a neglected mountain path overgrown with weeds that is suddenly cleared, restoring clear passage. It is used when a remark, lesson, or realization instantly dispels confusion.
📜 Origin Story
The phrase comes from the Mencius, chapter 'Jin Xin II' (《孟子·尽心下》), a Warring States period text recording the teachings of Mencius (孟子, 4th century BCE). Mencius compares the mind to a narrow path on a mountain ridge: walked constantly, it becomes a clear road, but left unused even briefly, weeds soon choke it shut. Addressing his disciple Gaozi (高子), he warns, '今茅塞子之心矣' — 'weeds have now blocked your mind.' Over the centuries this image of weeds clogging the heart was fused with 顿开 (suddenly opened) to form the idiom, shifting the sense from blocked understanding to the sudden clearing of understanding.
💡 Example Usage
听完老师的一番点拨，他顿开茅塞，终于弄懂了这道难题。
After the teacher's few words of guidance, it was as if a light went on for him, and he finally understood this difficult problem.
🏷️ Category
➕ Similar Idioms
➖ Opposite Idioms
🔤 Quick Facts
- Chinese: 顿开茅塞
- Pinyin: dùn kāi máo sè
- Literal Translation: suddenly, opens, a mind blocked like a weed-choked path
- Category: Knowledge
- Characters: 4