There was a champion greyhound, who had never lost a race. Yes sir, he was a winner the likes of which no other greyhound racing dog had ever been.
One day, just out of the blue, he hung up his racing paws and retired. He headed off to a quiet farm, and spent his time chasing through the long grass and basking in the glorious rays of the sun.
“Why did you stop racing?”, his greyhound mate and big admirer asked him. “You were the best of the best. You won every race at every event. You were the king. You were a success. Why have you thrown it all away?”
And the champion greyhound replied, “Well, you know that rabbit we chase after at every race … it’s not a real rabbit.”