expression, godan verb (-ku)
have a narrow view of things; peek at the sky through the eye of a needle
Idiomatic expression meaning to have a very limited perspective or to judge the world from a tiny viewpoint. The literal image is of looking at the vast sky through a needle's eye.
彼の意見は針の穴から天を覗くようなものだ。
His opinion is like looking at the sky through the eye of a needle.
針の穴から天を覗くような考え方では、世界の広さはわからない。
With a way of thinking that's like peeking at the sky through a needle's eye, you can't understand the vastness of the world.