"Where sin increased, grace overflowed all the more." (Romans 5:20) Whether we know it or not, we are engaged in a spiritual battle. This battle “is not with flesh and blood but with the principalities, with the powers, with the world rulers of this present darkness, with the evil spirits in the heavens” (Ephesians 6:12). So if we want to fight and win this battle, we need to “put on the armor of God” (6:11).