There's a famous essay by Isaiah Berlin based
on a little short poem of the ancient Greeks, which went:
The fox knows many things.
The hedgehog knows only one, one big one.
This is when I was on a Greek island.
It's four lines long.
When the hedgehogs here at night see a car and its fierce lights
coming at them, they do the one big thing they know.
And the title is Flat Hedgehogs.