What kind of dialogue did the bird and frog have in the sky?

A frog is sitting in a well, and a bird is flying around the well.

The frog asked the bird, "Where did you fly from?"

The bird replied, "I came from far away." I flew more than a hundred miles in the sky and I was thirsty. I came down to find some water to drink. "

The frog said, "friend, don't talk big!" " The sky is only as big as the wellhead. Do you still need to fly that far? "

"You are mistaken," said the bird. The sky is boundless and vast! " "

The frog smiled and said, "Friend, I sit in the well every day. When I look up, I see the sky." I won't make mistakes. "

The bird also smiled and said, "Friend, you are wrong. Do not believe me, jump out of the well and have a look. This idiom begins with a sentence like this

A frog at the bottom of the well

I always thought the sky was only the size of a wellhead.

One day he was taken out of the well by a bird, only to find that the sky was not just as big as the wellhead. It means, don't just think in your own way, otherwise you will be limited, or you can say that you are ignorant.