A lot of people feel like urban fantasy is a shortcut that gets you around world-building, because it's set "in the real world." But it doesn't really work that way, as I found out. You have to come up with just as consistent an internal cosmology and magic system as you would if you were writing high fantasy.

What do you think it would have been like if Valentine had brought you up along with me? Would you have loved me?" Clary was very glad she had put her cup down, because if she hadn't, she would have dropped it. Sebastian was looking at her not with any shyness or the sort of natural awkwardness that might be attendant on such a bizarre question, but as if she were a curious, foreign life-form. "Well," she said. "You're my brother. I would have loved you. I would have...had to.

Every heart has its own melody.

I believe that authors don't have a responsibility to include "messages" in their work, but they do have a responsibility to write a world that seems true and real, never more than when expecting readers to believe in magic and angels and fairies.

But it was mortality that made them what they were, the flame that blazed brighter for it's flickering

And I'm suppose to sit by while you date boys and fall in love with someone else, get married...?" His voice tightened. "And meanwhile, I'll die a little bit more every day, watching.

I learned to play the instruments of war," he said, "and paint in blood.