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

“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.”

“Astriola. That IS demon pox. You had evidence that demon pox existed and you didnt mention it to me! Et tu, Brute!' He rolled up the paper and hit Jem over the head with it.”

“Forsooth, I no longer toil in vain,
To prove that demon pox warps the brain.
So though 'ti pity, it's not in vain
That the pox-ridden worm was slain:
For to believe in me, you all must deign.”

“Their grandchildren had reminded Will of the song about demon pox he had taught them- when they were much too young, Tessa had always thought- and that they had all memorized. They sang it all together and out of tune, scandalizing Sophie.”

“Gabriel’s green eyes sought Will. “It was demon pox, wasn’t it? You know all about it, don’t you? Aren’t you some sort of expert?”
“Well, you needn’t act as if I invented it,” said Will.”

“Will!" Charlotte threw up her hands. "Why didn't you say so?"
"You know, the books on demon pox are in the library," Will said with an injured tone. "I wasn't preventing anyone from reading them”

“The demons will always be there, Always. But you know, (hard breath) you can always fight demons.”

“The demons are always around and he knows it.”

“Demons are wary of talking and must be forced to speak. When demons are voluntarily chatty it's a trick to distract the exorcist. We must never ask useless questions out of curiosity. We but must interrogate with care. We always begin by asking for the demon's name.”