[Prefect shrugs]

I'm just saying, we only see the things that people show us. He's not given you any reason to believe in him. I just happen to have spent the last two years trying to force him to be better.

[Prefect pauses, at Cassel's answer as to why he doesn't want to hurt Patches, his expression ponderous. It sort of makes sense, he supposes.]

So you only want to hurt people who you think either will or have hurt other people, which is everyone, more or less.