Take a couple hundred thousand ants, chewing a swath through the jungle. They’ll cut a fairly straight line until they get to a stream. Then they’ll chew their way along the stream until they find a crossing. Then they’ll chew their way back to where they left off and continue the straight line.
Interview one of them along the way and he’ll just say he’s keeping the ass of the ant in front of him in relatively the same place. But take all of them together, and they’re thinking fairly clearly with one brain. Acting together, they can bring the mountain to Muhammed. Even though they don’t realize it.
(Hat tip to Alan Fletcher. )