"[Rincewind] objected to the fact that you had to be good at magic to be a wizard. He knew he was a wizard, deep in his head. Being good at magic didn't have anything to do with it. That was just an extra, it didn't actually define somebody."
" 'I don't think you understand. A wizard isn't what you do, it's what you are. If I wasn't a wizard, I wouldn't be anything.' "