[Kratos would like to deny it, but doesn't. He can't remember ever being able to change; even the choice to abandon his commission had been in pursuit of his duty. There's no point in saying it; Raine would only reject it.

[In any case, what she says seems to be impossible. There's things he does which he doesn't even think about, and he isn't sure how to explain the impossibility of doing anything different before he's already done it.]

I'm not sure you understand the influence of cruxis crystals long-term.

[It isn't a dismissive comment, so much as a searching one, the beginnings of an attempt at explanation before Kratos has to stop.]