Summer insects can't talk about ice, which means that you can't talk about ice with insects growing in summer.
It means that time limits people's knowledge.
1. From Zhuangzi, Outer Chapter, Autumn Water, Volume VI of Zhuangzi Collection.
2. Original text: Chuang Tzu's Collection of Interpretations, Volume VI, Outer Chapter, Autumn Water, Beihai Ruo said, "Well frogs can't talk in the sea. They are confined to emptiness;"; The summer worm can't talk to the ice, but stick to the time; Qushi should not be bound to the Tao, but to the teachings.
3. Well frog sentence refers to that the frog in the well should not talk about the sea with him, because his vision is limited by his narrow residence; The insects who live and die in summer cannot talk about ice and snow with them because their vision is restricted by the seasons.
4. "Later, he used the word" summer insects can't speak ice "to describe people who are limited by their knowledge.