Well I was in the middle of composing a reply late last night/early morning but that got sidetracked by this awesome game involving "werewolves" (and I use the term very loosely).
So, to wit.
I'm still not convinced about the whole "diet" issue showing courage. Perhaps in the beginning, when they were learning to resist human blood, a case could be made for that. But when we meet the Cullens, they are all (with perhaps the possible exception of Jasper) rather used to their way of life. Even in that book Edward mentions that the instinctual reaction remains present, but he's learned to dull it. At this point I can no longer call it an act of courage or sacrifice. It becomes a sort of habit- one you do without much thought, the constant repetition conditioning yourself for or against whatever it is you need. It's like someone so used to eating red meat trying to learn to eat salad instead; the initial transition period is fraught with temptation and steeling yourself against it, but eventually you're able to skip over that juicy steak and opt for the taco salad without much of an afterthought. It becomes normal for you to eat salads.
The fact that the younger Cullens are actually in high school also kills the whole "resisting human blood is so hard" sentiment. In fact the only time we really see it mentioned is during the blood typing incident- and in that book Alice casually reminds Edward about the experiment that day. It's not even a "so the whole class is pricking their fingers- might want to stay away from school" moment. It's just a "might want to skip that class" moment. Certainly doesn't give any import to how difficult it's supposed to be to resist blood. (And before we go there, Edward's comment about smelling Mike's blood actually helps with my point of view, since he puts the scent away so easily- disdainfully, even.)
I guess I'll never really see this aspect of their unlives as others do. If that book ever comes out, who knows- maybe it will convince us one way or the other.


