Shield
You wouldn't want to be caught in battle without protection - a person can dodge only so many arrows and bullets! As in any battle, our spiritual shields are effective in our spiritual war against Satan's attacks. Our "shield of faith" represents our unwavering confidence in God, which we effectively use to defend ourselves from Satan's blows. For example, Satan may try to make us fearful about life, but we believe that because of our relationship with God, he will guide and protect us in any situation. A lively faith in God protects us from Satan's arrow of fear.

King David was a warrior who knew about the protection and saving strength of a shield. He wrote a metaphor to describe the kind of trust he had in God: "But you are a shield around me, O LORD" (Psalm 3:3).

Like David, we know that the Lord is our defender and refuge. Trials and temptations come into our lives, and we must contend with them as though we were in battle. But God is greater than all of our troubles, and he is also greater than the enemy's schemes to destroy us. Not one arrow can pierce through God's hedge of protection. The almighty God is our shield; he has the undeniable victory.

We are to use the shield of faith to defeat Satan's attacks.
Ephesians 6:16
God is compared to a shield because he is our salvation and protection.
Deuteronomy 33:29
2 Samuel 22:3
Psalm 3:1-3
Proverbs 30:5
1 Peter 1:3-5