Ephesians 6:16 “Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts if the wicked.”
Each car comes with a piece of glass called a windshield. The windshield when clean allows light to pass through it so that the driver can see what is in front of him. It keeps the rain out, it keeps the wind at bay, it prevents debris from getting into the drivers eyes thereby blinding him or her. The windshield is a simple design but works very hard. And it’s overall size protects more than just the eyes, everything that is behind it is protected.
Without a windshield there is no protection. The same holds true for the shield of faith. Without it we are very much exposed. Think about it, no shield means the acid rain of gossip will fall on us. If there is no shield the winds of false doctrine will whip us about and the debris of open hostility from this world will crush us. And no shield means we have no light to see with, for we walk by faith and not by sight (2 Corinthians 5:7).
The shield protects us from so much but it is only as big as our overall faith is. Very little faith means very little shield, one that the enemy easily gets around or even knocks out of our hand. That is why so any Christians have fallen away, they didn’t develop their faith. The more we work on our faith the stronger in the faith we become, and the bigger shield of faith we can carry into battle. Also regular excise with it will keep it clean and not filthy with the smut of this world which will only weigh us down.
Faith is a powerful defense but because humans are involved it means we must work on it every day or it will shrivel up and fade away.