Perhaps, but you do question yourselves. Whether you're doing the right thing, whether things can be better, for one person or many people. What the world around you means. Whether there's a world beyond what you can see and feel.

Doubt is exhausting to an angel. We're not built to question, I don't think. Sometimes it seems like it's most of what humans do. I find that fascinating.

[His brush strokes slow for a moment, then go back to the rapid sweeping patterns. At this rate, he'll be done in another minute or two.]

Yes, that's a suitable analogy. A firewall.