Aziraphale questions that too, of course - the Why. Why are they here? Why were they forced out of Earth, only to end up in these ludicrous places? Why did they loose most of their powers, only to gain them back here? Perhaps that's the worst of it all; asking so many questions of such grandeur is truly a recent thing for him, so he does get stuck in his head about it quite a bit.

"Oh, I'm sure we'll be fine." He tuts, as if experience hadn't taught him just how wrong that could be. "We've certainly been through stickier situations than this." A beat. "Er...well, we've been through a lot, at least."