We're not sure why Jacob still believes the photos have been manipulated. Has he managed to deny the fact that Grandpa was killed by a monster? Or can he accept monsters but not peculiar children?

Jacob needs safety after Grandpa dies in the woods, so he stays home. Unfortunately, he goes a little overboard, and the home becomes more of a trap than a safe haven. Jacob doesn't even go to Grandpa's funeral.

When no one believes him, Jacob knows how his grandfather felt all those years. And it sure doesn't feel good.

Jacob tries to betray his psychiatrist by lying to him and saying he's all better, but (1) Dr. Golan is able to see right through that, like a good psychiatrist should, and (2) Dr. Golan is ultimately trying to betray Jacob by having him lead right to his grandfather's true home.

Jacob thinks it's a betrayal of his grandfather's memory if he just throws all his stuff away. But maybe it's just an age difference. What's Grandpa going to do with the stuff anyway, now that he's dead? Dad understands that, but Jacob isn't old enough to get that yet.

The realistic-looking image convinces Jacob that this might be true. If it had been a goofy-looking one, Jacob probably would have written Miss Peregrine off as fantasy right then and there.

Jacob thinks he's a quitter because that's basically all he's tried to do—he quits his job, he quits school, and he quits leaving the house. He's remarkably successful at quitting.

Miss Peregrine's letter is subtle, to say the least. "Little has changed" not just because they're isolated on an island, but because they're isolated in time.