Once up on a time a greedy dog found a bone.
He went searching of a good place to eat. He wanted to cross the bridge. While crossing the bridge he saw his shadow on the water. He thouth that there was a another dog. He barked at that at the time of barking the bone fell down in the water. The dog tried to found a bone in the water but he could not found the bone in the water. So he went away from the bridge that s why the elders say that in every time we have to use our mind and make work and get progress.