In this excerpt, Marianne pities her mother and Elinor because they can't seem to enjoy the sensations of simply walking in nature. It also reveals that Marianne enjoys every moment in a way which is over dramatic and superior. She believes that since she enjoys the small things that she is getting more out of life. It also reveals how that Marianne holds no regard for the future and proclaims things quite confidently.
Jane Austen attitude towars Marianne is reflected in this text. She shows her to be a helpless romantic, who is passionate and driven by strong feelings and imagination. Elinor, on the other hand, sees Marianne as childish and apted to rush headlong into trouble.
This excerpt, in which Marianne pities her mother and Elinor because they can't enjoy the sensations of simply walking in nature, reveals that Marianne enjoys every moment in a way which is over dramatic and superior. She thinks that since she enjoys small things that she is getting more out of life. It also shows how, since heavy rain is coming and Marianne will soon injure herself, that Marianne holds no regard for the future and proclaims things confidently.
The paragraph uses more complex words to show how important the situation was, instead of using words like "amazing" or "wonderful". It sets the tone of the sentence.