What is the relationship between the last sentence of the article Little Mouse Travels to the Seaside and the full text?

Point out the result. The little mouse successfully traveled. A lot of happiness can only be obtained after going through hardships.

"The sunset faded, and the moon and stars began to appear over the sea. The little mouse sat quietly on the top of the mountain, completely immersed in a deep peace and contentment." The article is in chronological order. , the first ray of glow has just risen in the sky - afternoon - evening - the sunset has disappeared. The little mouse wanted to broaden his horizons and increase his knowledge, but his parents were afraid of danger and did not support him. Later, he went through hardships to get it.