Suddenly become enlightened; have one's mind opened; suddenly understand a profound truth or principle.
经过老师耐心细致的讲解，他终于顿开茅塞，明白了这道难题的解法。
After the teacher's patient and detailed explanation, he finally became enlightened and understood the solution to this difficult problem.
Era:
Ancient
Frequency:
Story:
During the Warring States period, a man named Gaozi was inconsistent in his studies, often giving up halfway.
Mencius criticized him, saying, "A narrow path on a mountain, if frequently walked, will become a wide road. But if no one walks on it for a while, it will be overgrown and blocked by thatch. Your mind is similarly blocked by thatch, which prevents you from making progress."
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