Why can frogs in the well only see the sky as big as the wellhead?

Because frogs live at the bottom of a well, the sky outside is only as big as a well, so frogs think that the fingers in the sky are as big as the wellhead. This idiom refers to a person with short knowledge. If you don't go out and see the outside world, you will just sit and look at the sky all day, which will not have a good result.

The idiom is to sit and watch the sky. Now it is often used to describe and satirize people with narrow vision or shallow knowledge. From the Tang Dynasty poet Han Yu's "The Original Road", he sat in the well and watched the sky, saying that the sky was small, but it was not small. Synonyms of this idiom are frog in the well, short-sightedness, speculation, touching an elephant blindly, peeping at a leopard in a tube and so on.

Idiom implication

The frog in the well thinks that the sky he sees is all the sky. He doesn't believe that there is such a vast ocean in the world. Frogs have never walked out of that well, just as some people have never walked out of their original living environment and have narrow doubts about the world they have never seen. Nature is great and infinite, in contrast, the individual is so small.

There are so many things in nature that we don't know. Only by observing nature deeply can people increase their knowledge and turn the unknown into the known. People should break through the shackles that bind them and bravely go outside. Only by trying to contact the new world that I have never seen before can I enrich my life and sublimate my personality.

The above content source: Baidu Encyclopedia-Sit in the well and watch the sky.