I'm at work so I don't have my copy handy but one of my favourite quotes from not only the books but the movie as well is when Gandalf has just found Sam evesdropping on their conversation. It goes something like this.
"Nothing really. Just something about a dark lord and the end of the world, please don't turn me into anything un-natural!"
It sets up Sam and all of his innocent enthusiasm for the rest of the book.
