井いの中なかの蛙かわず、大たい海かいを知しらず

expression

the frog in the well knows nothing of the great ocean

Proverb meaning that a person with a narrow perspective cannot understand the wider world. Often used to caution against arrogance born of limited experience.

• 井いの中なかの蛙かわず、大たい海かいを知しらずというように、自じ分ぶんの経けい験けんだけで判断だんしてはいけない。

  As the saying goes, 'the frog in the well knows nothing of the great ocean,' so you shouldn't judge based only on your own experience.