“Don't mess with me, Calvin. You'll only get hurt.”

“Mingling with people, hurting them, getting hurt by them…that's how you learn about others…and about yourself. If you don't you'll never be able to care about anyone but yourself.”

“Don't hurt someone who cares about you like that. You're not the only person in the world who's ever been hurt. Don't be cruel. Don't go breaking someone else's heart in the hope that you'll feel better. Becaues you won't.”

“You'll never get to a person's soul until you understand their hurts.”

“Trust me, you can't play the game if you don't know the rules. And if you don't know the rules, someone's bound to get hurt.”

“Don't mess with me, lady. I've been drinking with skeletons.”

“Literature got me into this mess and literature is going to have to get me out of it.”

“Love's an excuse to get hurt and to hurt.
Do you like to hurt?
I do, I do
then hurt me.”

“Is this the part where you say if I hurt her, you'll kill me?"
"No" Simon said, "If you hurt Clary she's quite capable of killing you herself. Possibly with a variety of weapons.”

“If it ain't a mess, it'll do till the mess gets here.”