Stephenie Meyer said this quote

Isabella. He pronounced my full name carefully, then playfully ruffled my hair with his free hand. A shock ran through my body at his casual touch. Bella, I couldn't live with myself if I ever hurt you. You don't know how it's tortured me. He looked down, ashamed again. The thought of you, still, white, cold . . . to never see you blush scarlet again, to never see that flash of intuition in your eyes when you see through my pretenses . . . it would be unendurable. he lifted his glorious, agonized eyes to mine. You are the most important thing to me now. The most important thing to me ever.