A long time ago there was a king who embarked on a long journey, those days there was neither sandal nor motors for transportation, when the King came back from his journey, his leg was covered with sores, He lamented "the world is full of thorns", he said to his servant, cover the whole world with leather. One of his chief advise him that instead of covering the whole world with leather why can't he just cut a little pieces of the leather to cover his leg.