37 For yet in a very little while,
He who is coming will come, and will not delay.
38 But My righteous one shall live by faith;
And if he shrinks back, My soul has no pleasure in him.
39 But we are not of those who shrink back to destruction, but of those who have faith to the preserving of the soul.” Hebrews 10:32-39.
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We don’t have faith in the strength of our own faith. But rather, we have faith in God Who gives us that faith and Who preserves that God-given faith. That is why we don’t shrink back.
Regarding the fact that God gives us faith, consider the following Reformed Confessions:
The Heidelberg Catechism speaks of true faith being “an assured confidence, which the Holy Ghost works by the gospel, in my heart”.
Question 21. What is true faith?
Answer. True faith is not only a certain knowledge, whereby I hold for truth all that God has revealed to us in his word, but also an assured confidence, which the Holy Ghost works by the gospel, in my heart; that not only to others, but to me also, remission of sin, everlasting righteousness and salvation, are freely given by God, merely of grace, only for the sake of Christ’s merits.
The Belgic Confession likewise recognizes that “the Holy Ghost kindleth in our hearts an upright faith”.
Article 22: Of Faith in Jesus Christ.
We believe that, to attain the true knowledge of this great mystery, the Holy Ghost kindleth in our hearts an upright faith, which embraces Jesus Christ, with all his merits, appropriates him, and seeks nothing more besides him. For it must needs follow, either that all things, which are requisite to our salvation, are not in Jesus Christ, or if all things are in him, that then those who possess Jesus Christ through faith, have complete salvation in him. Therefore, for any to assert, that Christ is not sufficient, but that something more is required besides him, would be too gross a blasphemy: for hence it would follow, that Christ was but half a Savior. Therefore we justly say with Paul, that we are justified by faith alone, or by faith without works. However, to speak more clearly, we do not mean, that faith itself justifies us, for it is only an instrument with which we embrace Christ our Righteousness. But Jesus Christ, imputing to us all his merits and so many holy works which he has done for us, and in our stead, is our Righteousness. And faith is an instrument that keeps us in communion with him in all his benefits, which, when become ours, are more than sufficient to acquit us of our sins.
The Westminister Larger Catechism teaches: “Justifying faith is a saving grace, wrought in the heart of a sinner by the Spirit and Word of God”.
Question 72: What is justifying faith?
Answer: Justifying faith is a saving grace, wrought in the heart of a sinner by the Spirit and Word of God, whereby he, being convinced of his sin and misery, and of the disability in himself and all other creatures to recover him out of his lost condition, not only assents to the truth of the promise of the gospel, but receives and rests upon Christ and his righteousness, therein held forth, for pardon of sin, and for the accepting and accounting of his person righteous in the sight of God for salvation.
The Canons of Dordt points to “the gift of justifying faith” and “that he should confer upon them faith, which together with all the other saving gifts of the Holy Spirit, he purchased for them by his death”.
Article 8. For this was the sovereign counsel, and most gracious will and purpose of God the Father, that the quickening and saving efficacy of the most precious death of his Son should extend to all the elect, for bestowing upon them alone the gift of justifying faith, thereby to bring them infallibly to salvation: that is, it was the will of God, that Christ by the blood of the cross, whereby he confirmed the new covenant, should effectually redeem out of every people, tribe, nation, and language, all those, and those only, who were from eternity chosen to salvation, and given to him by the Father; that he should confer upon them faith, which together with all the other saving gifts of the Holy Spirit, he purchased for them by his death; should purge them from all sin, both original and actual, whether committed before or after believing; and having faithfully preserved them even to the end, should at last bring them free from every spot and blemish to the enjoyment of glory in his own presence forever.
Regarding the fact that God preserves that God-given faith, consider the following from the Canons of Dordt from FIFTH HEAD OF DOCTRINE Of the Perseverance of the Saints:
Article 3. By reason of these remains of indwelling sin, and the temptations of sin and of the world, those who are converted could not persevere in a state of grace, if left to their own strength. But God is faithful, who having conferred grace, mercifully confirms, and powerfully preserves them herein, even to the end.
Article 8. Thus, it is not in consequence of their own merits, or strength, but of God’s free mercy, that they do not totally fall from faith and grace, nor continue and perish finally in their backslidings; which, with respect to themselves, is not only possible, but would undoubtedly happen; but with respect to God, it is utterly impossible, since his counsel cannot be changed, nor his promise fail, neither can the call according to his purpose be revoked, nor the merit, intercession and preservation of Christ be rendered ineffectual, nor the sealing of the Holy Spirit be frustrated or obliterated.
“But we are not of those who shrink back to destruction, but of those who have faith to the preserving of the soul.” Verse 39.