Sebastian Morgenstern: You always cared more about the Mortal Instruments than you did your own son.
Valentine Morgenstern: That's not true. Despite everything I've done, I have always... always cared about you.
Sebastian Morgenstern: Do not lie to me. If you truly, truly cared about me, you would have never sent me away.
Valentine Morgenstern: I made a mistake. It was Jace that was...
Sebastian Morgenstern: Shut up!
Valentine Morgenstern: The sword still compels the truth. Jonathan... not a day goes by that I don't think about you. Where I am not haunted by that decision I made. To send you to Edom.
Sebastian Morgenstern (about Edom): I'm afraid it's not a very nice place. The first day I was there, they started burning my skin. Just one layer at a time. They said I was too pretty for their world... Too human. So they made me hideous. But they also taught me how to use my demon blood... how to... draw from its power. See, I may be grotesque in my own skin, but... with it I have power that you could only dream of.
Isabelle Lightwood: You don't know my mom. She expects nothing less than perfection. Always. Sometimes I wonder if I could ever live up to it.
Sebastian Verlac: You know, maybe that's the attitude that got you hooked in the first place?
Isabelle Lightwood: I don't want to disappoint her.
Sebastian Verlac: Izzy, it's... it's okay to struggle. Life is a struggle. The point is that you are in recovery, and you are succeeding. Quite well, I might add.
Sebastian Verlac: Where did you learn? Who taught you?
Jace Herondale: Valentine, if you can believe that.
Sebastian Verlac: Huh. I guess even an evil mastermind can appreciate fine music.
Jace Herondale: Yeah... maybe a little too much. Whenever I would make a mistake, he'd break the offending finger, then Iratze my hand and have me start again.
Sebastian Verlac: Well, I, uh... I'm surprised you still play.
Jace Herondale: Only when the mood strikes.