You have to come to the rich city life. The country life is boring and simple and it has boring and simple food. Come to the city life it is so rich my friend.
City Mouse: When the coast is clear we're going to come out
Actually, I am going to go I would rather live a simple life than a rich life in a fear. That is my opinion.
Lets go eat now since they're gone.
The City mouse is currently judging his country friend opinions a bit. Saying that the country is boring and plain and that he should come to the city life. It is all fine to have your own opinion but it is not cool when you're judging something that someone else likes.
The country mouse wanted to see the city-life though and or his friend recommendation. Yes they got really good food than just seeds and corn but they live their life in fear (cats and humans so they hide a lot) so the two mouses have different opinions on their lifestyle.
As you can see, this book was full different opinions like the country mouse believes that a simple but peaceful life is better than his friend's opinion a rich but scary life. But, that is fine to have opinions but you should never judge someone opinions like that, which is the whole story's central idea that everyone has different opinions.