"It's like in the great stories, Mr. Frodo, the ones that really mattered. Full of darkness and danger they were. And sometimes you didn't want to know the end, because how could the end be happy? How could the world go back to the way it was, when so much bad happened. But in the end, it's only a passing thing, this shadow, even darkness must pass. A new day will come, and when the sun shines, it'll shine out the clearer. Those are the stories that stayed with you, that meant something, even if you were too young to understand why. But I think Mr. Frodo, I do understand, I know now. Folk in those stories had lots of chances of turning back, only they didn't, they kept on going. Because they were holding on to something. [What are we holding on to, Sam?] That there is some good in this world Mr. Frodo, and it's worth fighting for. "
~The Lord of the Rings: The Return of the King