How does he change as a character over the course of the journey? How does he change the characters around him?

In The Hobbit, Bilbo does not merely endure his journey to the Lonely Mountain; in fact, he prevails. How is Bilbo’s journey a triumph for him? How does he change as a character over the course of the journey? How does he change the characters around him? How does he help not only himself, but also others?
Write a well-developed essay in which you discuss the questions above. Be sure to make specific references to The Hobbit in your response, and be sure to use in-text citations whenever you make direct references to the text. Do not merely summarize the book.