The two are now bound inextricably. Should one die, the other will follow. No wepon in this world can wound only one of them

The only way you would have failed," she said, "is if you had.

I used to think if I married Master Jem—” Sophie picked at the blanket, then looked up and smiled bleakly. “You haven’t broken his heart yet, have you?” “No,” Tessa said. Just torn my own in two. “I haven’t broken his heart at all.

... everything seemed to him a uniform shade of gray- even the people! He had been unable to believe it could rain so much in one place, and so unceasingly. The damp had seemed to come up from the floors and into his bones, so that he'd thought he would eventually sprout mold, in the manner of a tree. "You do get used to it," he said "Even if sometimes you feel as if you out to be able to be wrung out like a washrag." p 311

In a closed urban fantasy, the magical world is secret and no one knows about it. In an open urban fantasy, everyone knows about it. So with a closed fantasy, you have to figure out how the world keeps itself secret, and with an open one, you have to figure out how knowledge of magic has altered the world we know.

Clary grinned. "A picnic? It's a little late for Central Park, don't you think? It's full of - " He waved a hand. "Faeries. I know." "I was going to say muggers," said Clary. "Though I pity the mugger who goes after you." "That is a wise attitude, and I commend you for it," said Jace, looking gratified.

She looked up at him with a smile. The smile broke what was left of his resistance--shattered it. He had let the walls down when he'd thought she was gone, and there was no time to build them back up.