Professor, why couldn't we just Apparate directly into your old colleague's house?' 'Because it would be quite as rude as kicking down the front door,' said Dumbledore. 'Courtesy dictates that we offer fellow wizards the opportunity of denying us entry.
J. K. Rowling'Harry Potter' gave me back self respect. Harry gave me a job to do that I loved more than anything else.
J. K. RowlingHe [Uncle Vernon] held up the envelope in which Mrs. Weasleyโs letter had come, and Harry had to fight down a laugh. Every bit of it was covered in stamps except for a square inch on the front, into which Mrs. Weasley had squeezed the Dursleysโ address in minute writing. โShe did put enough stamps on, then,โ said Harry, trying to sound as though Mrs. Weasleyโs was a mistake anyone could make.
J. K. Rowling