Snape's patronus was a doe,' said Harry, 'the same as my mother's because he loved her for nearly all of his life, from when they were children.

How do you remember everything from different books when you are still writing the HP series? As obsessive fans will tell you, I do slip up! Several classrooms move floors mysteriously between books and these are the least serious continuity errors! Most of the fansites will point you in the direction of my mistakes. But the essentials remain consistent from book to book because the story has been plotted for a long time and it is clear in my mind.

Youth cannot know how age thinks and feels. But old men are guilty if they forget what it was to be young.

We do not need magic to transform our world. We carry all of the power we need inside ourselves already.

Writing for me is a kind of compulsion, so I don't think anyone could have made me do it, or prevented me from doing it.

If you are writing children's books, you need to be a ruthless killer.

Imperfect understanding is often more dangerous than ignorance.