“And the sound of your heart,” he continued. “It’s the most significant sound in my world. I’m so attuned to it now, I swear I could pick it out from miles away. But neither of these things matter. This,” he said, taking my face in his hands. “You. That’s what I’m keeping. You’ll always be my Bella, you’ll just be a little more durable.”
"I saw no reason for fear. I couldn't imagine anything in the world that there was left to be afraid of, not physically at least. One of the few advantages of losing everything."
"I don’t trust myself to be… enough. To deserve you. There’s nothing about me that could hold you." He stopped and reached around to pull me from his back. His gentle hands did not release me ; after he’d set me on my feet again, he wrapped his arms tightly around me, hugging me to his chest. "Your hold on me is permanent and unbreakable", he whispered. "Never doubt that."
So, why does Edward bother being good ? Because he doesn’t like causing suffering. Even living on the death of the very evilest of humans, eventually all the killing makes him feel purely monstrous, and he hates feeling that way. He wants to feel like himself. He wants to feel the higher human emotions (love for his family particularly) that get lost when you live for the hunt and the bloodlust. He doesn’t think being good will earn him anything, but he still does it, because he still thinks good is better than bad, whether it gives him something in return or not.
