I feel very confident about the first three. Less so about the last two, but I still feel like he generally would agree with them. If that's not the general consensus though, (Judging by the downvotes, it isn't) I'll change the attributions.
This raises an interesting question though: when is it appropriate to attribute it to the author? The most obvious example I can think of would be John Galt's speech in Atlas Shrugged - surely it's reasonable to attribute that to Rand: it's practically a nonfiction essay slapped in the middle of a book. Less ambiguous though: what about the words of a narrator? (I have a quote by Virginia Woolfe that was said by the narrator) Should that be attributed to the author? What if the narrator is a character in the story (Camus, The Plague, another one of my quotes)?
This raises an interesting question though: when is it appropriate to attribute it to the author?
Never. It's fiction, so you should never attribute a quote from there to a real person. Never, never, never.
Here's the new thread for posting quotes, with the usual rules: