Amanda Grayson said:AMANDA (to Spock): When you were five years old and came home stiff-lipped, anguished, because the other boys tormented you saying that you weren't really Vulcan. I watched you, knowing that inside that the human part of you was crying and I cried, too...
I completely forgot about this dialogue (it's been ages since I watched J to B), but I now realize this is totally the motivation behind the scene in ST'09.