And again and again and again, Dr Cambridge. Till the multiverse wears out or till I do, whichever 'appens first.

[She says this with a kind of sturdy pride, and her hands on him move with more confidence. He is also one of those people, or will be; there's no real difference in Iris' view between potential and actual.]

I'm not saying it's easy, but trying to avoid it'll break you far worse and far deeper. 'Sides, people are worth it. But you're the last person I need to tell that to, aren't you, sweetheart?