In all circumstances take up the shield of faith, with which you can extinguish all the flaming darts of the evil one;  (Ephesians 6:16, ESV)

The shield of faith is not a what, but a who.

Jesus, You are my shield—by faith, my gaze remains steady in attack.  What have I to fear?

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Not by my faith, do I find safety—but by the object of my faith, do I find refuge.

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With my gaze fixed upward in faith, I stand in the safety and refuge of Jesus, my shield. 

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Whom have I to fear when my faith rests here?