What role does the ending sentence of the snow greeting card play in the full text?

The ending sentence of the Snowy Greeting Card played the role of concluding the whole text, pointing out the theme, expressing the author's feelings, etc. The last sentence can leave a deep impression on the readers and let them understand the main idea of the article better. At the same time, the ending sentence could also express the author's emotions, allowing the readers to feel the author's joy or sadness.