I've never wanted to be a witch, but an alchemist, now that's a different matter. To invent this wizard world, I've learned a ridiculous amount about alchemy. Perhaps much of it I'll never use in the books, but I have to know in detail what magic can and cannot do in order to set the parameters and establish the stories' internal logic.
J. K. RowlingLike the fact that the person Sirius cared for the most about in the world was you," said Dumbledore quietly.
J. K. RowlingWell, think back," said Harry. "Have you ever let it slip that you'd like to go out in public with the words 'My Sweetheart' round your neck?
J. K. Rowling