This story, sometimes also refered to as a Taoist story, has helped me put things in perspective at times when it's been difficult to look ahead and the present has been overwhelming.
Once upon the time there was an old farmer who had worked his crops for many years. One day his horse ran away. Upon hearing the news, his neighbors came to visit. “Such bad luck,” they said sympathetically.
“Maybe,” the farmer replied.
The next morning the horse returned, bringing with it three other wild horses. “How wonderful,” the neighbors exclaimed.