Ephesians 6:16

Above all Επι πασιν, upon, or over all, these and the other parts of your armour, as a sort of universal covering; taking the shield of faith Continually exercise a strong and lively faith in the truths and promises of the gospel, and in the person and offices, the merits and grace of the Lord Jesus, in whom all these truths and promises are, yea and amen, 2 Corinthians 1:20. Wherewith If you keep it in lively exercise; ye shall be able to quench To repel and render without effect; all the fiery darts The furious temptations, the violent and sudden injections; of the wicked Του πονηρου, the wicked one, Satan, called so by way of eminence, because in him the most consummate skill and cunning are joined. Anciently they used small firebrands, in the form of darts and arrows, which they kindled and shot among their enemies. These were called βελη πεπυρωμενα, tela ignita, fiery darts. And in battle they were received by the soldiers on their shields, which were covered with brass or iron, in order to extinguish them, or prevent their effect. Or, as Dr. Goodwin and many others suppose, the apostle may refer to an ancient custom, still prevailing among some barbarous nations, to dip their arrows in the blood or gall of asps and vipers, or other poisonous preparations, which fire the blood of those who are wounded with them, occasion exquisite pain, and make the least wound mortal. And some Greek writers tell us, that it was usual for soldiers to have shields made of raw hides, which immediately quenched them. It is also certain that some arrows were discharged with so great a velocity, that they fired in their passage. See Doddridge.