"And consumes energy you could better use in preventing instead of worrying about it.* But, don't you see? Even if they're good at hiding, they don't want to hide when they're not hiding from someone specific, ne? They wear their style like you wear your hat. So if you don't see them, either they aren't there, they're already trying to kill someone who isn't you (in which case you shouldn't worry), or they're already trying to kill you, in which case you should probably stop worrying and start making funeral arrangements, ne?"
Xel is a very comforting priest to talk to, he knows. It is a point of pride.
"Well, that's one of the nice things about libraries that were built and stocked for non-magic-using populations. A high percentage of the people who might feel like doing something awful on any given day don't think the library is a fun place to be, so they do the awful things somewhere else. So the librarians don't have to get used to awful things happening, and when it does they call in specialists in awful happenings." He smiles broadly. "You know, I know one sorcerer who destroyed about six temples and two libraries in a single afternoon, once, because the people of that town didn't know how to deal with awful happenings." That had been such a good day. He'd laughed so hard he'd fallen right off the dome of the local town hall.
What?!?! My poor lenses what they cut up in cold blood? Nothing like it! I tell you, they were framed!
* Xellos's typist and her probable generalized anxiety disorder would like to take Xel's advice. Really.