"The Fox and the Rabbit"

Once upon a time there was a cunning fox who hunted by tricking other. One day a rabbit hopped across the field in front of the fox's house. The fox saw the rabbit and thought of a devious plan to get the rabbit.
The next day the rabbit frolicked across the fields and the fox quietly tiptoed up to it and pounced. The fox missed and the rabbit ran away. The fox tried to trick the rabbit for weeks and weeks but failed. Eventually the fox got weaker and more tired everyday until one day while he was chasing the rabbit, he tripped and fell. The Rabbit then said:

Moral: Don't go after somethings useless.