This quote appeared in tonight's issue of the Starwars.com newsletter:

"Humans have so many emotions, Artoo. And most seem to cause them pain. I do not understand, but I'm glad I have none. And yet -- I can't help wondering sometimes... what it would be like."
- C-3PO, Protocol Droid. Star Wars 2: World of Fire.

Many people wrote in immediately and said - what???

UPDATE
Elvis writes in and reminds us that Marvel published several paberback novels of their comics in the eighties.

One of these was called Star Wars 2: World Of Fire and they are quoting this book. It had a green cover with a full-color illustration, but the story was in black and white and chopped up from it's original comic book sized layout to fit the much smaller paperback. You can check it out further here in our comics section.