Once upon a time, there was a little sparrow that lived in a forest. The sparrow was always complaining about its small size and was envious of other birds that were bigger and stronger. One day, a wise owl heard the sparrow's complaints and decided to teach it a valuable lesson. The owl asked the sparrow to pick up a small twig and hold it in its beak. The sparrow did so, and the owl told it to fly to the top of a nearby tree. The sparrow flapped its wings furiously but was unable to re...