This is more necessary than any of them. Faith is all in all to us in an hour of temptation. The breast-plate secures the vitals; but with the shield we turn every way. This is the victory over the world, even our faith. We are to be fully persuaded of the truth of all God's promises and threatenings, such a faith being of great use against temptations. Consider faith as it is the evidence of things not seen and the substance of things hoped for, and it will appear to be of admirable use for this purpose. Faith, as receiving Christ and the benefits of redemption, so deriving grace from him, is like a shield, a sort of universal defence. Our enemy the devil is here called the wicked one. He is wicked himself, and he endeavours to make us wicked. His temptations are called darts, because of their swift and undiscerned flight, and the deep wounds that they give to the soul; fiery darts, by way of allusion to the poisonous darts which were wont to inflame the parts which were wounded with them, and therefore were so called, as the serpents with poisonous stings are called fiery serpents. Violent temptations, by which the soul is set on fire of hell, are the darts which Satan shoots at us. Faith is the shield with which we must quench these fiery darts, wherein we should receive them, and so render them ineffectual, that they may not hit us, or at least that they may not hurt us. Observe, Faith, acted upon the word of God and applying that, acted upon the grace of Christ and improving that, quenches the darts o f temptation.