Dumbledore paused, and although his voice remained light and calm, and he gave no obvious sign of anger, Harry felt a kind of chill emanating from him and noticed that the Dursleys drew very slightly closer together. “You did not do as I asked. You have never treated Harry as a son. He has known nothing but neglect and often cruelty at your hands. The best that can be said is that he has at least escaped the appalling damage you have inflicted upon the unfortunate boy sitting between you.
J. K. RowlingWell, better expelled and able to defend yourselves than sitting safely in school without a clue," said Sirius.
J. K. RowlingDid you know— then?” asked Harry. “Did I know that I had just met the most dangerous Dark wizard of all time? No.
J. K. Rowling