This story is told of a boy who was floating his boat on a pond when the boat drifted away. A man came by, saw the boat drifting out on the pond, and began throwing stones on the far side of the boat. The boy asked, "what are you doing?"
But then something very interesting happened. As the stones hit the water beyond the boat, they created ripples which pushed the boat back toward the boy. Even though the stones disturbed the smooth water, they achieved the desired result.
That's how it is with God sometimes. When we drift away from Him, He throws disturbing stones out beyond us in order to push us back to the shore of His love.