In his exposition of the sixth petition of the Lord’s Prayer (lead us not into temptation, but deliver us from the evil one), Thomas Watson explains how faith can be so strong as to resist Satan’s temptations in such a way that he flees from us (cf. James 4:7):
[Faith can resist Satan and put him to flight because] it brings the strength of Christ into the soul. Samson’s strength lay in his hair—ours lies in Christ. If a child is assaulted, it runs and calls to its father for help. Just so, when faith is assaulted, it runs and calls Christ, and in his strength overcomes. “In every situation take the shield of faith, and with it you will be able to extinguish the flaming arrows of the evil one.” Ephesians 6:16
Faith furnishes itself with a store of promises. The promises are faith’s weapons to fight with. As David, by five stones in his sling, wounded Goliath—so faith puts the promises, as stones, into its sling. 1 Sam 17:40. “I will never leave you nor forsake you.” Heb 13:5. “A bruised reed shall he not break.” Matthew 12:20. “Who will not allow you to be tempted above that you are able.” 1 Cor 10:13. “The God of peace shall bruise Satan under your feet shortly.” Romans 16:20. “No man is able to pluck them out of my Father’s hand.” John 10:29. Here are five promises, like five stones, put into the sling of faith, and with these a believer may wound the red dragon. Faith being such a grace to resist and wound Satan, he watches his opportunity to batter our shield, though he cannot break it.
Indeed, this is why Paul said that faith is a shield “with which you will be able to extinguish all the flaming arrows of the evil one” (Eph. 6:17 NASB).
Covenant Presbyterian Church (OPC)
Hammond, WI, 54015