Good luck, bad luck. Who knows?

Good luck, bad luck. Who knows?
A farmer's horse ran away one day and all the villagers came to him saying, Oh what bad luck you've had! Your horse that you need to do your work is gone!
The farmer shrugged his shoulders and said: "Good luck, bad luck. Who knows?"
Several days later, the farmer's horse returned, followed by a herd of wild horses!
Oh what good luck you have, cried the same villagers! Not only has your horse returned, he has brought you many horses!
The farmer again shrugged his shoulders and said: "Good luck, bad luck. Who knows?"
One day not long after, the farmer's son was trying to break one of the wild horses. He was thrown off the horse and broke his leg.
Oh what bad luck you have! Cried the villagers. Now your son has a broken leg. Who will help you?
The farmer shrugged his shoulders and said: "Good luck, bad luck. Who knows?"
Not long after, as the son was recuperating, an army came through the village and took all the young males to fight in a war in another region. They did not take the farmer's son because of his broken leg.
Oh what good luck you have! The villagers cried once again. Your son has been spared being taken off to war because of his broken leg!
The farmer shrugged his shoulders and said: "Good luck, bad luck. Who knows?"
~ Author Unknown