“I need Jace,” said Sebastian. “But in his heart, he’s not like me. Butare.”

“Jace: 'I don't like keeping her in the dark.'
Sebastian: 'We'll tell her in a week. What difference does a week make?'
Jace: 'Two weeks ago you were dead.'
Sebastian: 'Well, I wasn't suggestingweeks. That would be insane.”

“Well, hello there, Mother,” Sebastian said in a voice like silk. “Surprised to see me?”

“jace's clothes had been clean, stylish, ordinary. Sebastian had been wearing a long black wool trench coat that had looked expensive.
Like an evil Burbeery ad, Simon said when she was done.”

“"I forgot that's what gets you all hot and bothered, Jace. Girls killing things."
"I like anyone killing things," He said equably, "Especially me."”

“He has many things I haven’t got,” said Jace. “Like nearsightedness, bad posture, and an appalling lack of coordination.”
-Jace about Simon, pg. 331-”

“You have a dark heart in you, Valentine’s daughter,” he said. “You just won’t admit it. And if you want Jace, you had better accept it. Because he belongs to me now.”

“Jace told me once you’d walk all over my heart in high-heeled boots, and it hasn’t stopped me.
Isabelle gave a little gasp of startled laughter. “He said that? And you stuck around?”
He leaned in toward her … “I would consider it an honor.”

“Before Clary could respond, Jace’s eyes slid open. He looked up at the warlock, dazzled and dizzy. “What are you doing here?”
Magnus grinned down at Jace, and his teeth sparkled like sharpened diamonds.
“Hey roommate,” he said.
-pg. 128-”

“And then I asked him with my eyes to ask again yes and then he asked me would I yes and his heart was going like mad and yes I said yes I will yes.”