The world is a globe — the farther you sail, the closer to home you are.
One day I'll work out what it is you are saying, my lad, and then you'll be in trouble.
Give anyone a lever long enough and they can change the world. It's unreliable levers that are the problem.
What're quantum mechanics?" "I don't know. People who repair quantums, I suppose.
It doesn't stop being magic just because you know how it works.
Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH,' the paint wouldn't even have time to dry.