Eragon Theme of The Supernatural

As a novel smack dab in the fantasy genre, supernatural is front and center in Eragon. You want elves? This book's got 'em. How about dwarves? Lots of dwarves here. Magic, dragons, evil monsters? Check, check, and check. One of the central journeys of the book (you could argue that is the central journey) is the transformation of Eragon himself from a regular old turnip farmer into a master of supernatural abilities. His world is entirely changed by supernatural forces and he must enter a whole new reality of magic and mysticism. Luckily, it's a ride that we as readers get to go on, too. Sweet deal.

1. Are there some things about the supernatural (like dark magic) that should never be known, never see the light of day?
2. Which of the two worlds—his regular, human world or the supernatural, magic world—do you think Eragon is most comfortable in? Explain your answer.
3. Do you think that being supernatural (e.g., an elf, dwarf, or dragon) acts as a barrier to understanding human beings? Or is it somehow helpful? Why do you think so? 
4. Do you think that Eragon's supernatural powers change his character in any way? Or is he the same farm boy at heart? Why?