It was a hot summer day. The sun was shining brightly, without a cloud in the sky. Along the road walked a fox who was both hungry and thirsty. "I hope I can find something to eat soon," the fox said to herself.
Up ahead, the fox saw a farmhouse, and in front of the farmhouse there was a tall trellis covered with grapevines. At the very top of the trellis, high up in the air, the fox saw a big bunch of grapes. The grapes were dark purple in color, very ripe and ready to eat. "Grapes!" shouted the fox. "Those will be delicious for sure!"
Excited, the fox ran up to the trellis and leaped high in the air, but the trellis was very tall. Even though she jumped as high as she could, the fox was not able to reach the beautiful grapes. The fox leaped again, but she still could not jump as high as the grapes. She tried one more time, and for a third time she failed to get the grapes.
Disgusted, the fox exclaimed, "Those grapes are obviously sour. Nobody wants to eat sour grapes!" She then continued along her way, just as hungry and thirsty as before.
The moral of the story is that people often despise the things they cannot have.