“Is he mad? Anyway there's something on his mind, as sure as there must be something on a deck when it cracks.”

“When people say "clearly" something that means there's a huge crack in their argument and they know things aren't clear at all.”

“You guessed? You must have been pretty sure, considering you could have killed me.""I was ninety percent sure.""I see," Clary said. There must have been something in her voice, because he turned to look at her. Her hand cracked across his face, a slap that rocked him back on his heels. He put his hands on his cheek, more in surprise than pain."What the hell was that for?""The other ten percent.”

“...surely there is something in madness, even the demoniac, which Satan flees, aghast at his own handiwork, and which God looks on in pity..”

“He thought of trying to explain something he had recently noticed about himself: that if anyone insulted him, or one of his friends, he didn't really mind--or not much, anyway. Whereas if anyone insulted a novel, a story, a poem that he loved, something visceral and volcanic occurred within him. He wasn't sure what this might mean--except perhaps that he had got life and art mixed up, back to front, upside down.”

“If there must be madness, something may be said for having it on a heroic scale”