Harry looked around, seeing the papers everywhere. On the walls, on the floors, on the tables. He looked at the stool, then at the chair, and didn't sit. In fact it was very hard for him no to leave. Peter sounded like a sulky teenager who most certainly didn't want him there.
"Remus said you changed," he said. "That you now want the chance you rejected. Dumbledore and Severus said something similar. I'm here because I want to see what they see that I still haven't."