Snape raised his wand and pointed it directly at Dumbledore.... - J.K. Rowling, Harry Potter and the Half-Blood Prince

"Don't count your owls before they are delivered."

"I don't mean to be rude—"he began, in a tone that threatened rudeness in every syllable."Yet, sadly, accidental rudeness occurs alarmingly often,"Dumbledore finished the sentence gravely."

"You could say sorry,"suggested Harry bluntly. "What, and get attacked by another flock of canaries?"muttered Ron."What did you have to imitate her for?""She laughed at my mustache!""So did I, it was the stupidest thing I've ever seen."

"I am a wizard, not a baboon brandishing a stick."

"I don't think you should be an Auror, Harry,"said Luna unexpectedly. Everybody looked at her. "The Aurors are part of the Rotfang Conspiracy, I thought everyone knew that. They're working to bring down the Ministry of Magic from within using a mixture of dark magic and gum disease."