“Demonic activity levels? Do they have a device that measures whether the demons inside the house are doing power yoga?”-Simon, pg.340-”

“She was afraid you'd freak out? Start seeing demons in the White House?"... "There are demons in the White House?""I was kidding," said Jace. "I think."-Jace & Clary”

“I thought you hated demons. Now you use them like servants. The Ravener, the Drevak demons, Agramon-they‘re your employees. Guards, butler-personal chef, for all I know.”-Jace to Valentine, pg.260-”

“Demon pox. There's always demon pox.”

“Maybe you should call him,' Simon suggested, trying not to think too hard about how weird it was to be giving a demon hunter advice about possibly dating a warlock.”

“Do people ever climb the demon towers? Like, for any reason?" Aline looked up. "Climb the demon towers?" She laughed. "No, no one ever does that. It's totally illegal, for one thing, and besides, why would you want to?" Aline, Isabelle thought, did not have much imagination. She herself could think of lots of reasons why someone might want to climb the demon towers, if only to spit gum down on passerbys below.”

“Will: Have you ever seen what happens to someone with demon pox? First it lies dormant. One begins to turn yellow and green. Then the swelling sets in -Jem: THERE IS NO SUCH THING AS DEMON POX.”