Hey, I am at a point in my story where the character is trying to come to terms with being a dreamwalker. She is standing in her dream world and thinking that everything that has happened to her has been inside her head. I wanted to use the quote from Harry Potter and the Deathly Hallows when Dumbledore says: “Of course it is happening inside your head, Harry, but why on earth should that mean that it is not real?” But I don't know if that is allowed. It would suit the story well, because she is of an age to have read those books and in a situation that is very appropriate for its use. But I just don't know the rules.