The lesson is this:
The arrow is already sitting in the center of the target. There is no past, when the arrow was in the bow. There is no future where the arrow can be elsewhere. There is only NOW, and the arrow is in the center of the target now. Already.
No sport has greater affinity to this than golf. The other closest two would be billiards (pool) and darts.
When you feel as if you might hit a bad golf shot, you will. When you feel the bliss of the moment, the ball will travel to the target. Tiger Woods is currently the best example of zen archery on the PGA Tour.