Charles H. Spurgeon on Psalms 91:9

Because thou hast made the Lord, etc. What faith is this, what trust is that which God hath promised protection and deliverance to in the time of a plague? What act of faith is it? What faith is it? I answer first, there is a faith of persuasion, called faith, whereby men are persuaded and verily believe that they shall not die, nor fall by the hand of the plague. This is well; but I do not find in the 91st Psalm that this protection is entailed upon this persuasion, neither do I find this faith here mentioned. There is also a faith of reliance, whereby a man doth rely upon God for salvation; this is a justifying faith, true justifying faith; this is true faith indeed; but I do not find in this Psalm, that this promise of protection and deliverance in the time of a plague is entailed upon this, nor that this is here mentioned.

But again, there is a faith, I may call it a faith of recourse unto God, whereby a man doth betake himself unto God for shelter, for protection as to his habitation; when other men do run one this way, another that way, to their hiding places: in the time of a plague for a man then to betake himself to God, as to his habitation, I think this is the faith here spoken of in this 91st Psalm: for do but mark the words of the Psalm: at Ps 91:1, "He that dwelleth in the secret place of the most High, "in the hiding place of the Most High: as if he should say, "When others run from the plague and pestilence and run to their hiding places, ""He that dwelleth in the secret place of the Most High, "that betakes himself to God as his Hiding place and his habitation, he shall abide under the shadow of the Almighty, shall be protected; and so at Ps 91:9, "Because thou hast made the Lord which is my refuge, even the Most High thy habitation, there shall no evil befall thee, neither shall any plague come nigh thy dwelling; "as if he should say to us, In time of a plague men are running and looking out for habitations and hiding places; but because thou hast made the Lord thy habitation and hast recourse to him as thy habitation, "no evil shall befall thee, neither shall the plague come nigh thy dwelling:" and again at Ps 91:11 it is said, "He shall give his angels charge over thee to keep thee in all thy ways, "the ways of thy calling; as if he should say, In the time of a plague men will be very apt to leave station and calling, and so run away from the plague and pestilence; but saith he, "He shall give his angels charge over thee, to keep thee in all thy ways, "the ways of thy calling and place; that is, look when a man in the time of a plague shall conscientiously keep his station and place, and betake himself to God as his habitation; this is the faith that is here spoken of, and this is the faith that God hath promised protection to, here in the 91st Psalm... This promise of protection and deliverance is not made to a believer as a believer, but as acting and exercising faith; for though a man be a believer, if he do not act and exercise his faith, this promise will not reach him, therefore if a believer die, not exercising faith and trusting in God, it is no disparagement to the promise. William Bridge.