When it is recalled that until the Christian era the underworld was never regardded as a hostile area, that all gods were useful and essentially friendly to man despite occasional lapsesl when we see the steady methodical inculcation into humanity of the idea of man's worthlesseness - until redeemed - the necessity of the Devil may become evident as a weapon, a weapon designed and used time and time again in every age to whip men into a surrender to a particular church or church state.