People aren't born good or bad. Maybe they're born with tendencies either way, but its the way you live your life that matters.

To marry a girl just to make her a widow,” said Gabriel Lightwood. “Many would say that was not a kindness.

You screamed.” Will said. “Is that all you did?” “I screamed a great deal.” Tatiana sounded injured.

I just don't see why the past has to matter.

I hate that stuff. It tastes like feet." At that he smiled. "How would you know what feet taste like?" "I just know.

[Will Herondale] would say he knew a warlock who was a better friend, and more worth trusting, than many a nephilim warrior.

Words were weapons, his father had taught him that, and he'd wanted to hurt Clary more than he'd ever wanted to hurt any girl. In fact, he wasn't sure he had ever wanted to hurt a girl before. Usually he just wanted them, and then he wanted them to leave him alone.