I am not worried, Harry,"said Dumbledore, his voice a little... - J.K. Rowling, Harry Potter and the Half-Blood Prince

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

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

"An Unbreakable Vow?"said Ron, looking stunned. "Nah, he can’t have.... Are you sure?""Yes I’m sure,"said Harry. "Why, what does it mean?""Well, you can’t break an Unbreakable Vow...""I’d worked that much out for myself, funnily enough."

"Sometimes you remind me a lot of James. He called it my 'furry little problem' in company. Many people were under the impression that I owned a badly behaved rabbit."

"Dumbledore says people find it far easier to forgive others for being wrong than being right."