Our Most Important Weapon in the Fight against Spiritual Warfare

As the great teacher and writer Oswald Chambers wrote, "Your mind is the greatest gift God has given you and it ought to be devoted entirely to Him. You should seek to be bringing every thought into captivity to the obedience of Christ...' (2 Corinthians 10:5). This will be one of the greatest assets of your faith when a time of trial comes, because then your faith and the Spirit of God will work together." So how do we fight? What is our most important weapon in the fight against spiritual warfare?