John Gill wrote: 1. Faith is not the cause, but an effect of justification; it is not the cause of it in any sense; it is not the moving cause, that is the free grace of God; "Being justified freely by his grace", #Ro 3:24 nor the efficient cause of it; "It is God that justifies", #Ro 8:33 nor the meritorious cause, as some express it; or the matter of it, that is the obedience and blood of Christ, #Ro 5:9,19 or the righteousness of Christ, consisting of his active and passive obedience; nor even the instrumental cause; for, as Mr. Baxter {5} himself argues, "If faith is the instrument of our justification, it is the instrument either of God or man; not of man, for justification is God's act; he is the sole Justifier, #Ro 3:26 man doth not justify himself: nor of God, for it is not God that believes": nor is it a "causa sine qua non", as the case of elect infants shows; it is not in any class of causes whatever; but it is the effect of justification: all men have not faith, and the reason why some do not believe is, because they are none of Christ's sheep; they were not chosen in him, nor justified through him; but justly left in their sins, and so to condemnation; the reason why others believe is, because they are ordained to eternal life, have a justifying righteousness provided for them, and are justified by it, and shall never enter into condemnation: the reason why any are justified, is not because they have faith; but the reason why they have faith, is because they are justified; was there no such blessing of grace as justification of life in Christ, for the sons of men, there would be no such thing as faith in Christ bestowed on them; precious faith is obtained through the righteousness of our God and Saviour Jesus Christ, #2Pe 1:1 nor, indeed, would there be any room for it, nor any use of it, if a justifying righteousness was not previously provided. Agreeable to this are the reasonings and assertions of Twisse {6}, Maccovius {7}, and others. Now if faith is not the cause, but the effect of justification; then as every cause is before its effect, and every effect follows its cause, justification must be before faith, and faith must follow justification.
2. Faith is the evidence and manifestation of justification, and therefore justification must be before it; "Faith is the evidence of things not seen", #Heb 11:1 but it is not the evidence of that which as yet is not; what it is an evidence of, must be, and it must exist before it. The "righteousness of God", of the God-man and mediator Jesus Christ, "is revealed from faith to faith", in the everlasting gospel, #Ro 1:17 and therefore must be before it is revealed, and before faith, to which it is revealed: faith is that grace whereby a soul, having seen its guilt, and its want of righteousness, beholds, in the light of the divine Spirit, a complete righteousness in Christ, renounces its own, lays hold off that, puts it on as a garment, rejoices in it, and glories of it; the Spirit of God witnessing to his spirit, that he is a justified person; and so he is evidently and declaratively "justified in the name of the Lord Jesus, and by the Spirit of our God", #1Co 6:11.
3. Faith adds nothing to the "esse" only to the "bene esse" of justification; it is no part of, nor any ingredient in it; it is a complete act in the eternal mind of God, without the being or consideration of faith, or any foresight of it; a man is as much justified before as after it, in the account of God; and after he does believe, his justification does not depend on his acts of faith; for though "we believe not, yet he abides faithful"; that is, God is faithful to his covenant engagements with his Son, as their Surety, by whose suretyship-righteousness they are justified; but by faith men have a comfortable sense, perception and apprehension of their justification, and enjoy that peace of soul which results from it; it is by that only, under the testimony of the divine Spirit, that they know their interest in it, and can claim it, and so have the comfort of it.