When in doubt, go to the library.

He [Uncle Vernon] held up the envelope in which Mrs. Weasley’s 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 Dursleys’ address in minute writing. “She did put enough stamps on, then,” said Harry, trying to sound as though Mrs. Weasley’s was a mistake anyone could make.

I think it's alarming that people believe that success enables one to forget how life felt before. As if one could simply exchange one's values.

Lee Jordan was finding it difficult not to take sides. 'So — after that obvious and disgusting bit of cheating —' 'Jordan!' growled Professor McGonagall. 'I mean after that open and revolting foul —' 'Jordan, I'm warning you —' 'All right, all right. Flint nearly kills the Gryffindor Seeker, which could happen to anyone, I'm sure, so a penalty to Gryffindor, taken by Spinnet, who puts it away, no trouble, and we continue play, Gryffindor still in possession.

Remus Lupin was supposed to be on the H.I.V. metaphor. It was someone who had been infected young, who suffered stigma, who had a fear of infecting others, who was terrified he would pass on his condition to his son. And it was a way of examining prejudice, unwarranted prejudice towards a group of people. And also, examining why people might become embittered when they're treated that unfairly.

I think they thought it was very arrogant of me to write the end of my seven books series when I didn't have a publisher and no-one had heard of me

I enjoyed the meetings, too. It was like having friends.