For free will is what makes us Heaven's creatures.

How could you have guessed?” Miserable though Will was, he felt free, as if a heavy burden had been displaced from him. “I did all I could to hide and deny it. You—you never hid your feelings. Looking back, it was clear and plain, and yet I never saw it. I was astonished when Tessa told me that you were engaged. You’ve always been the source in my life of such good things, James. I never thought you would be the source of pain, and so, wrongly, I never thought of your feelings at all. And that is why I was so blind.

Whatever you are physically,' he said, 'Male or female, strong or weak, ill or healthy -- all those things matter less than what your heart contains. If you have the soul of a warrior, you are a warrior. Whatever the color, the shape, the design of the shade that conceals it, the flame inside the lamp remains the same. You are the flame.

Will bounded up onto one of the ladders and yanked a book off the shelf. "I'll find you something else to read. Catch." He had let it fall without looking and Tessa had to dart forward to seize it before it hit the floor. - Clockwork Angel

Will interrupted. "Henry," he said, "you're on fire. You do know that, don't you?

Simon I've been trying to call you, but it seems like your phone is turned off. I don't know where you are right now. I don't know if Clary's already told you what happened tonight. But I have to go to Magnus's and I'd really like you to be there. I'm scared for my brother. I never ask you for anything, Simon, but I'm asking you now. Please come. Isabelle. Simon let the letter fall from his hand. He was out of the apartment and on his way down the steps before it had even hit the floor.

One must always be careful of books.