He had some measure of the infuriating trait that causes a young man to be a nonconformist for its own sake and found that the surest way to shock most people, in those days, was to believe that some kinds of behavior were bad and others good, and that it was reasonable to live one's life accordingly.

How could your cover be blown in Canada? Why even bother going dark there? How could you tell?

..this is just like life must be for about 99 percent of the people in the world. You're in this place. There's other people all around you, but they don't understand you and you don't understand them, but people do a lot of pointless babbling anyway. In order to stay alive, you have to spend all day every day doing stupid meaningless work. And the only way to get out of it is to quit, cut loose, take a flyer, and go off into the wicked world, where you will be swallowed up and never heard from again.

We see everything from the narrator's point of view, so exposition about the world is limited to what impinges directly on him and the story he's telling. Considering how old the world is, we learn very little about its history, which I think is a good thing.

That's funny because if anyone actually did prove the existence of God we'd just tell him 'nice proof, Fraa Bly' and start believing in God.

It was, of course, nothing more than sexism, the especially virulent type espoused by male techies who sincerely believe that they are too smart to be sexists.

Humans needed water or they would die, but dirty water killed as surely as thirst. You had to boil it before you drank it. This culture around tea was a way of tiptoeing along the knife edge between those two ways of dying.