A fox invited a stork for dinner and served a soup in a wide and low dish.
Unfortunately, the stork couldn't easily eat the soup because of her long bill.
After a few days, the fox visited the stork; but when they were seated at table, the dinner was cointened in a very long jar with a narrow mouth.
The stork ate with relish thanks to her bill, whereas the fox couldn't taste even a little.
At the end, the stork said: "You misbehaved with me, so now I do likewise with you".
This fables teaches that you should behave with the others as you would like them behave with you.