"I just wanted things the way they were before. Was that wrong? It didn’t seem so horrible. After all, I hadn’t done this fo r myself alone, but for everyone. Esme and Carlisle and Emmett."

New Moon Extra - Miscalculation (Twilight, # 2.2) - Stephenie Meyer

I think this really shows who Rosalie is at the beginning of the series and how much she changes once she understands Edward's love for Bella. Quick little read!