He has to trust that - that she knows what she's talking about, that she's being completely honest when she says it, that she's singling out the right personality swimming in his skull. He has to trust it because he can't wholly trust himself, because he can't trust any of his selves.

She sounds sure of it.

"Guess it must be true." The words peter off with a half-huff, like a laugh that doesn't quite make it there, an attempt at levity fading and fleeting. "...you think this is gonna, maybe...wear off, or anything?"