There is an ancient Greek fable called "The Hedgehog and the Fox": The fox knows many things, but the hedgehog only knows one big thing. This battle between hedgehogs and foxes happens every day in some form or another, although the fox is smarter than the hedgehog, and the hedgehog always wins.
Princeton University professor Marvin Bresler pointed to the power of hedgehogs: "You want to know what separates those who make a big difference from others who are just as smart as them? It's hedgehogs."