Two topics have always been the subjects of discussion--- what is Satan and what is the purpose of his creation? Also, what could be the strategy to save oneself from his machinations and to dispel the fears that Satan creates in the hearts of human beings. These topics need discussion at length, The dissertations on the topics are neither comprehensible for the layman nor are necessary for him. Therefore, they are dealt here in brief to give the basic understanding to the common man.