一孔之见

Origin and story

Huan Kuan's Discourses on Salt and Iron (盐铁论), in the Xiang Ci chapter, presents a sharp exchange about the limits of knowledge. One speaker criticizes people who understand only a single opening or principle but cannot weigh changing circumstances. He compares their certainty to a cicada that knows nothing of snow. The opposing speaker replies that failure may lie with those unwilling to listen, not with the person offering advice.

The later idiom condenses the first speaker's image into a view through one small hole. It criticizes a narrow perspective, but speakers may also apply it modestly to their own suggestions, acknowledging that others can see more.