The fact that natural forces can be used before people find scientifically what they are is not a case for dismissing them as imaginary. If it were, we should know nothing now about electricity and the structure of matter.
Over a lunch that was half friendly and half conspiratorial, Hermione had wryly suggested she call it an army, but Susie had had enough of those. They were first and foremost mountain movers. They were digging up the good stone and setting down strong foundations, raising vaulting ceilings, building things that would last. […]