Spiritual battles are real and Paul acknowledges it here. The enemy that wants nothing but for us to fail are not physical, they might use people as vessel but ultimately, our fight is against them, not the vessels they are using. We do not fight spiritual battles with physical weapons, no, our weapons are spiritual, they are mighty in God for pulling down stronghold. Our spiritual weapons include; "stand your ground, putting on the belt of truth and the body armour of God's righteousness. For shoes, put on the peace that comes from the Good News so that you will be fully prepared. In addition to all of these, hold up the shield of faith to stop the fiery arrows of the devil. Put on salvation as your helmet, and take the sword of the Spirit, which is the word of God. Pray in the Spirit at all times and on every occasion. Stay alert and be persistent in your prayers for all believers everywhere."