How we cite our quotes: (Chapter.Paragraph)
Quote #4
Another Brian's emerging, I can tell. One I'm certain I'm not going to like at all. It occurs to me that Jude does this too, changes who she is depending on who she's with. (3.482-3.483)
Noah always feels like his same old awkward self. (At least, in the earlier time of the novel.) He's unnerved seeing the different faces of people close to him.
Quote #5
Is it possible our personalities have swapped bodies? (4.30)
Between ages 14 and 16, Noah and Jude's personalities, looks, friends and hobbies have changed a lot. They don't much resemble their former selves. But their new selves resemble their twin's former self. Um, you know what we mean.
Quote #6
"Dad, isn't there a disease where the flesh calcifies until the poor afflicted person is trapped within their own body like it's a stone prison?"…I don't share that I think the three of us all might have it metaphorically. Our real selves buried so deep in these imposter ones." (4.64 & 4.67)
Jude has the strong sense that she, her brother, and their dad are each, in their own way, living a lie. The only thing that would be worse would be actually having that disease.