Hearing voices no one else can hear isn't a good sign, even... - J.K. Rowling, Harry Potter and the Chamber of Secrets

"Well, you're expelling us aren't you?"said Ron."Not today, Mr. Weasley."Snape looked as though Christmas had been canceled."

"Hearing voices no one else can hear isn't a good sign, even in the wizarding world."

"The poor things keep calling in those – those pumbles, I think they're called – you know, the ones who mend pipes and things – ""Plumbers?""– exactly, yes, but of course they're flummoxed."

"I WILL NOT TOLERATE MENTION OF YOUR ABNORMALITY UNDER THIS ROOF!"

"Ginny!"said Mr. Weasley, flabbergasted. "Haven't I taught you anything? What have I always told you? Never trust anything that can think for itself if you can't see where it keeps its brain?"