There are thousands of good reasons why magic doesn't rule the world. They're called Witches and Wizards.
Terry PratchettHaven't you got any romance in your soul?" said Magrat plaintively. "No," said Granny. "I ain't. And stars don't care what you wish, and magic don't make things better, and no one doesn't get burned who sticks their hand in a fire. If you want to amount to anything as a witch, Magrat Garlick, you got to learn three things. What's real, what's not real, and what's the difference.
Terry PratchettPeople who are rather more than six feet tall and nearly as broad across the shoulders often have uneventful journeys. People jump out at them from behind rocks then say things like, "Oh. Sorry. I thought you were someone else.
Terry PratchettSometimes the crime follows the punishment, which only serves to prove the foresight of the Great God." "That's what my grandmother used to say," said Brutha automatically. "Indeed? I would like to know more about this formidable lady." "She used to give me a thrashing every morning because I would certainly do something to deserve it during the day," said Brutha. "A most complete understanding of the nature of mankind.
Terry Pratchett