[ He doesn't really know how to convey to the doctor what he means. He's so used to being able to just say "demon" and have it be understood. Aziraphale would get it. But, Aziraphale's been there for 6,000 years so of course he gets it. ]

Look, I... [ He waves his hands vaguely. ] It's nothing on you, Doctor. I'm just... My kind... Kindness isn't something we do. If one of us are being nice, it's probably because there's already a proverbial knife in the being they're being nice to's back and they're only about to tell them about the betrayal.

My default, no matter how much I try to shove it down, i to wonder when the other shoe is going to drop when someone is kind out of the blue to me.