Milk the cow, but do not pull off the udder.
It's a wonderful thing working with young actors. I know a lot of people don't like working with children. I actually adore it, because you watch their imagination open up and you watch them start to learn this job that I've been doing for so long. They come with such a lack of cynicism.
It was all very well going on about pure logic and how the universe was ruled by logic and the harmony of numbers, but the plain fact of the matter was that the Disc was manifestly traversing space on the back of a giant turtle and the gods had a habit of going round to atheists' houses and smashing their windows.