Six years ago I wrote a post about St. Paul's admonition to the Ephesians to "hold faith as a shield, to quench all [the] flaming arrows of the Evil One." In that post, I highlighted the communal value of shields in the Greek-speaking world, as when wounded Odysseus "called... [and] Aias came near him, carrying like a wall his shield, and stood forth beside him" to protect him from the Trojans. At the time, I thought this intercessory quality of faith, by which we are protected by the faith of our brothers, was a novel reading of this passage. Not so, I discovered.
Around AD 740, three monks - Denehard, Lullus, and Burchard - who assisted St. Boniface in his missionary work in Germany, wrote to Abbess Cuniburg in England. One of their requests to her was that "you will not refuse to shelter us against the cruel darts of sin with the shield of your prayer," a clear reference to Ephesians 6:16.
As Christians are suffering persecution around the world, and in many cases dying for the faith, please remember them in your prayers and extend the shield of your faith over them.