A Zen master had a dog who used to sit by the roadside waiting for vehicles to come around. As soon as one came he would run down the road, barking loudly and trying to overtake it restlessly.
One day a neighbour asked the master "Do you think your dog is ever going to catch a car?"
The master replied, "That is not what bothers me. What really bothers me is what he would do or achieve if at all he ever caught one? " Master smiled and went away conveying subtle and precise message.