“He looks," Simon had once said to Isabelle, "like he's thinking about something deep and meaningful, but if you ask him what it is, he'll punch you in the face.”

“Really? Are you going to ask him to be your partner?" Isabelle asked. "It's like cotillion, this partners business, except with killing."
"So, exactly like a cotillion," said Simon.”

“The warlock's gaze, on the flames, was remote and distant, as if he were looking back into the past. Simon couldn't help but remember what Magnus had said to him once, about living forever:
Someday you and I will be the only two left.”

“You think she’ll be able to talk sense into him?” she asked. “His sister?”
"If he listens to anyone, it would be her.”
“That’s sweet,” said Maia. “That he loves his sister like that.”
“Yeah,” Simon said. “It’s precious”

“Simon bristled. She wasn’t his Isabelle, not anymore. He wondered if she ever truly had been. Isabelle didn’t seem like the type of girl to belong to someone. It was one of the things he liked best about her.”

“And about Shane, I swear, if he doesn't snap out of it, I'm going to punch him in the face. Well, punch him in the face and then run like hell."
- Eve Rosser”

“What kind of guardian are you? Shouldn't you have gone to the bathroom with him?" Isabelle demanded.
Jordan looked horrified. "Dudes," he said, "do not follow other dudes to the bathroom.”

“Once you best a man, never gloat. Be generous and find something in his actions to praise. He won't enjoy being bested but he'll make a good face about it. Show him you appreciate it. Praise can win you a friend. Gloating will only ever make enemies.”

“Alec's trying to get Magnus to take him seriously, but he's never told our parents about Magnus, or even that he likes, you know -" "Warlocks?" Simon said.”

“You know, some people think Shadowhunters are just myths. Like mummies and genies." Kyle grinned at Jace. "Can you grant wishes?"

"That depends," he said. "Do you wish to be punched in the face?”