"The Mouse's Wedding "

 "You're more powerful than the wall," said Miss Mouse quickly.
"...who is more powerful than the wind," added Mother Mouse.
"...who is more powerful than the cloud," said Father Mouse.
"...who is more powerful than the sun!" finished Miss Mouse.
"Oh," said the handsome young mouse. "Then I suppose I am." (p 39 ~p 43)

I read "the Mouse's Wedding"

A family of mice visits somewhere to search for Miss Mouse's the most powerful husband in the world. They visited the sun, a cloud, the wind and a wall, and then asked them that you are more powerful than anymore in the world. Each of the said "I don't think so." When this family said to a handsome young mouse that you are more powerful than anymore, he said "yes."Finally, Miss Mouse got married to him.

I think the sun, a cloud, a wall and the wind are so humble, but the handsome young mouse is confident, so this is interesting point.