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.
Cassandra ClareNo," said Simon. "I know we're not much compared to you, but we don't kill our friends. We try to save them. If Heaven didn't want it that way, we ought to have been given the ability to love." He shoved his hair back, baring the Mark more fully. "No, you don't need to help me. But if you don't, there's nothing stopping me from calling you up again and again, now that I know you can't kill me. Think of it as me leaning on you Heavenly doorbell... forever.
Cassandra Clare