J.k. Rowling said this quote
“ You are blinded,” said Dumbledore, his voice rising now, the aura of power around him palpable, his eyes blazing once more, “by the love of the office you hold, Cornelius! You place too much importance, and you always have done, on the so-called purity of blood! You fail to recognize that it matters not what someone is born, but what they grow up to be! ”