Let the saints rejoice in this honour and sing for joy in their beds, May the praise of God be in their mouths and a double edged sword in their hands, to inflict vengeance on the nations and punishment on the peoples, to bind their kings with fetters, their nobles with shackles of iron, to carry out the sentence written against them. This is the glory of all his saints. Psalm 149:5-9
As Christians, we are not called to fight the devil. Satan, the devil, is our adversary, but he is already defeated! He has been judged and we are the ones authorised to execute his judgement!