“She said being human is being a young child on Christmas Day who receives an absolutely magnificent castle. And there is a perfect photograph of this castle on the box and you want more than anything to play with the castle and the knights and the princesses because it looks like such a perfectly human world, but the only problem is that the castle isn’t built. It’s in tiny intricate pieces, and although there’s a book of instructions you don’t understand it. And nor can your parents or Aunt Sylvie. So you are just left, crying at the ideal castle on the box which no one would ever be able to build”