Bruce Coville said this quote

I don’t want Tiamat to go back,” said Jeremy sullenly. “I want her to stay here with me.”Miss Priest laughed. It was not a horrible laugh at all. “What a terrible idea!” she said. “Why do you want her to stay?”Because I love her. I don’t want to lose her.”Miss Priest reached out and took his chin in her hand. She looked into his eyes. “You silly boy,” she said. “Nothing you love is lost. Not really. Things, people—they always go away, sooner or later. You can’t hold them, any more than you can hold moonlight. But if they’ve touched you, if they’re inside you, then they’re still yours. The only things you ever really have are the ones you hold inside your heart.