Elizabeth Noble said this quote

He held her face in his hands, and stared into her eyes, and said that she was his for only a while anyway, and that it wasn’t his going to Cranwell that would split them up. “You’re destined for greater things, Susannah Hammond. I see it in you. You’re so clever, so bright. So beautiful. So special. I’m not any of those things. Except when I’m flying, maybe. Down here, I’m ordinary. I’m going to be just a memory for you. A sweet one, I hope. Happy. But just a part of your past. I might be good enough for now, but I’m not good enough forever. Not for you.