That's right," he said. "I created a a bunch of Forsaken Warriors, had them attack the Institute and kill Madeleine and nearly kill the rest of us, just so that I could keep Clary from at home. And lo and behold, my diabolical plan is working.

Don't you hate it? Not ever saying how you really feel?

Don't sulk. For someone with all the grace and coordination of a pregnant wildebeest, you did great.

His steady gaze held hers. His blue eyes were very dark, uniquely so. She had known people before with blue eyes, but they had always been light blue. Will's were the color of the sky just on the edge of night.

I love you so much, so incredibly much," he went on, "and I forget when you're close to me, I forget who you are. I forget that you're Jem's. I'd have to be the worst sort of person to think what I'm thinking right now. But I am thinking it.

Oh, its big enough,” he said patronizingly, “but somehow I was expecting…you know.” He gestured with his hands, indicating something roughly the size of a house cat. “It’s the Mortal Cup, Jace, not the Mortal Toilet Bowl,” said Isabelle. -Jace & Isabelle, pg.349-

Do reasons matter when there's nothing that can be done to change things.