Th' ethereal mould Incapable of stain would soon expel Her mischief, and purge off the baser fire, Victorious. Thus repuls'd, our final hope Is flat despair.
John MiltonSome say no evil thing that walks by night, In fog or fire, by lake or moorish fen, Blue meagre hag, or stubborn unlaid ghost That breaks his magic chains at curfew time, No goblin, or swart fairy of the mine, Hath hurtful power o'er true virginity.
John Milton