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The Gift of Faith in Salvation and Justification

Faith in salvation and justification stands at the center of Christian soteriology, yet its precise nature and function have been articulated differently across traditions. Scripture presents justification as a divine gift: Paul writes that believers are "justified as a gift by His grace through the redemption which is in Christ Jesus" [1], and that God is "just and the one who justifies the person by faith in Jesus" [4]. The question is not whether faith is necessary, but what faith is and how it functions in the justifying act.

Faith as Instrumental Cause

The Protestant Reformation crystallized a particular understanding: faith is the instrumental cause of justification, not its meritorious ground. Justification itself is "the judicial act of God, by which he pardons all the sins of those who believe in Christ, and accounts, accepts, and treats them as righteous in the eye of the law" [2]. The law's demands are satisfied not by faith itself but by Christ's righteousness, which faith receives. This understanding emphasizes that "faith is merely the instrumental cause of justification. It is the act of receiving and resting up" on Christ [18]. The Augsburg Confession and the Thirty-Nine Articles both articulate justification by faith alone, though the specific formulations differ [13, 14].

Reformed theology stresses that even this instrumental faith is itself a gift. Philippians 1:29 is read to mean that "it has been granted as a favor," with the note that "faith is the gift of God (Eph 2:8), not wrought in the soul by the will of man, but by the Holy Ghost" [17]. Faith is thus both the means by which justification is received and a grace bestowed by God. One commentary summarizes: "justification is by faith, in order that its purely gracious character may be seen" [10]. The entire transaction—from the provision of righteousness in Christ to the faith that apprehends it—originates in divine initiative.

Faith and Works in Justification

The relationship between faith and works has been contested since the Reformation. Paul's statement that "a man is not justified" by works of the law is understood to mean that "neither the works of the Jewish law, nor of any other law, could justify any man" [9]. Yet Romans 2:13 states that "obeying the law . . . makes us right in his sight" [11], a tension that traditions resolve differently. Protestant exegesis typically distinguishes justification (a forensic declaration) from sanctification (the process of moral transformation), arguing that works follow justification as its fruit rather than contributing to it [12].

The Council of Trent, by contrast, articulated a Catholic position in which faith is the "beginning of human salvation, the foundation and root of all justification," yet not sufficient alone for justification [15]. This tradition emphasizes the transformation of the believer through infused grace, where faith works through love. Aquinas had earlier argued that man needs "a habitual gift whereby corrupted human nature is healed, and after being healed is lifted up so as to work deeds meritoriously of everlasting life" [19]. The debate turns on whether justification is purely forensic or also transformative, and whether the believer's cooperation is part of justification or its consequence.

Faith as Trust and Assurance

Faith is not mere intellectual assent. It is "in general the persuasion of the mind that a certain statement is true," but "its primary idea is trust" [7]. Knowledge is essential, yet faith "includes in it assent, which is an act" [7] of the will resting on Christ. This trust produces assurance, which is "produced by faith" and "made full by hope" [6]. The "full assurance of faith" (Hebrews 10:22) is described as "a fulness of faith in God which leaves no room for doubt" [5], though traditions differ on whether such assurance is normative for all believers or a special grace.

The gift character of faith extends beyond the initial act of justification. Faith is listed among the objects of divine giving: "In Christ is the gift of God" [8], and the Holy Spirit is given "to those who repent and believe" [3]. Augustine's phrase "grace for grace" is interpreted to mean grace given "for those merits which grace has conferred" [16], underscoring that even the response to grace is itself grace-enabled. The believer's faith, perseverance, and growth all depend on continued divine assistance, a point on which Augustinian traditions—whether Catholic or Reformed—largely agree.

Sources

  1. Romans “Romans 3:24 (NASB) — being justified as a gift by His grace through the redemption which is in Christ Jesus;”
  2. Easton's Bible Dictionary “Easton's Bible Dictionary: Justification — A forensic term, opposed to condemnation. As regards its nature, it is the judicial act of God, by which he pardons all the sins of those who believe in Christ, and accounts, accepts, and treats them as righteous in the eye of the law, i.e., as conformed to all its demands. In addition to the pardon (q.v.) of sin, justification declares that all the claims of the law are satisfied in respect of the justified. It is the act of a judge and not of a sovereign. The law is not relaxed or set aside, but is declared to be fulfilled in the strictest sense; an”
  3. Torrey's Topical Textbook “Torrey's Topical Textbook: Gift of the Holy Spirit, The — By the Father -- Ne 9:20; Lu 11:13. By the Son -- Joh 20:22. To Christ without measure -- Joh 3:34. Given According to promise. -- Ac 2:38,39. Upon the exaltation. -- Ps 68:18; Joh 7:39. Through the intercession of Christ. -- Joh 14:16. In answer to prayer. -- Lu 11:13; Eph 1:16,17. For instruction. -- Ne 9:20. For comfort of saints. -- Joh 14:16. To those who repent and believe. -- Ac 2:38. To those who obey God. -- Ac 5:32. To the Gentiles. -- Ac 10:44,45; 11:17; 15:8. Is abundant -- Ps 68:9; Joh 7:38,39. Is permanent -- Isa 59:21; Ha”
  4. Romans “Romans 3:26 (LEB) — in the forbearance of God, for the demonstration of his righteousness in the present time, so that he should be just and the one who justifies the person by faith in Jesus.”
  5. Easton's Bible Dictionary “Easton's Bible Dictionary: Assurance — The resurrection of Jesus (Acts 17:31) is the "assurance" (Gr. pistis, generally rendered "faith") or pledge God has given that his revelation is true and worthy of acceptance. The "full assurance [Gr. plerophoria, full bearing'] of faith" (Heb. 10:22) is a fulness of faith in God which leaves no room for doubt. The "full assurance of understanding" (Col. 2:2) is an entire unwavering conviction of the truth of the declarations of Scripture, a joyful steadfastness on the part of any one of conviction that he has grasped the very truth. The "full assurance ”
  6. Torrey's Topical Textbook “Torrey's Topical Textbook: Assurance — Produced by faith -- Eph 3:12; 2Ti 1:12; Heb 10:22. Made full by hope -- Heb 6:11,19. Confirmed by love -- 1Jo 3:14,19; 4:18. Is the effect of righteousness -- Isa 32:17. Is abundant in the understanding of the gospel -- Col 2:2; 1Th 1:5. Saints privileged to have, of Their election. -- Ps 4:3; 1Th 1:4. Their redemption. -- Job 19:25. Their adoption. -- Ro 8:16; 1Jo 3:2. Their salvation. -- Isa 12:2. Eternal life. -- 1Jo 5:13. The unalienable love of God. -- Ro 8:38,39. Union with God and Christ. -- 1Co 6:15; 2Co 13:5; Eph 5:30; 1Jo 2:5; 4:13. Peace with ”
  7. Easton's Bible Dictionary “Easton's Bible Dictionary: Faith — Faith is in general the persuasion of the mind that a certain statement is true (Phil. 1:27; 2 Thess. 2:13). Its primary idea is trust. A thing is true, and therefore worthy of trust. It admits of many degrees up to full assurance of faith, in accordance with the evidence on which it rests. Faith is the result of teaching (Rom. 10:14-17). Knowledge is an essential element in all faith, and is sometimes spoken of as an equivalent to faith (John 10:38; 1 John 2:3). Yet the two are distinguished in this respect, that faith includes in it assent, which is an act ”
  8. Torrey's Topical Textbook “Torrey's Topical Textbook: Faith — Is the substance of things hoped for -- Heb 11:1. Is the evidence of things not seen -- Heb 11:1. Commanded -- Mt 11:22; 1Jo 3:23. The objects of, are God. -- Joh 14:1. Christ. -- Joh 6:29; Ac 20:21. Writings of Moses. -- Joh 5:46; Ac 24:14. Writings of the prophets. -- 2Ch 20:20; Ac 26:27. The gospel. -- Mr 1:15. Promises of God. -- Ro 4:21; Heb 11:13. In Christ is The gift of God. -- Ro 12:3; Eph 2:8; 6:23; Php 1:29. The work of God. -- Ac 11:21; 1Co 2:5. Precious. -- 2Pe 1:1. Most holy. -- Jude 1:20. Fruitful. -- 1Th 1:3. Accompanied by repentance. -- Mr 1”
  9. Galatians (Methodist/Wesleyan) “Adam Clarke on Galatians 2:16: Knowing that a man is not justified - See the notes on Rom 1:17; Rom 3:24 (note), Rom 3:27 (note); Rom 8:3 (note). And see on Act 13:38 (note) and Act 13:39 (note), in which places the subject of this verse is largely discussed. Neither the works of the Jewish law, nor of any other law, could justify any man; and if justification or pardon could not have been attained in some other way, the world must have perished. Justification by faith, in the boundless mercy of God, is as reasonable as it is Scriptural and necessary.”
  10. Romans (Presbyterian) “Jamieson, Fausset & Brown on Romans 4:16: Therefore, &c.--A general summary: "Thus justification is by faith, in order that its purely gracious character may be seen, and that all who follow in the steps of Abraham's faith--whether of his natural seed or no--may be assured of the like justification with the parent believer."”
  11. Romans (Protestant academic) “Tyndale House on Romans 2:13: 2:13 obeying the law . . . makes us right in his sight: Regarding the promise of righteousness through obedience, see 2:7; see also Jas 1:22.”
  12. Romans (Nonconformist/Puritan) “Matthew Henry on Romans 5 (introduction): The apostle, having made good his point, and fully proved justification by faith, in this chapter proceeds in the explication, illustration, and application of that truth. I. He shows the fruits of justification (Rom 5:1-5). II. He shows the fountain and foundation of justification in the death of Jesus Christ, which he discourses of at large in the rest of the chapter.”
  13. Augsburg Confession (Lutheran) “Augsburg Confession (Lutheran, 1530), Article IV. Of Justification.: Article IV. Of Justification.”
  14. Thirty-Nine Articles of Religion (Anglican) “Thirty-Nine Articles of Religion (Anglican, 1571), 11.Of Justification.: 11.Of Justification.”
  15. Canons and Decrees of the Council of Trent on Justification (Catholic) “Canons and Decrees of the Council of Trent on Justification (Catholic, 1547), « Prev The Decree of Pope Pius IX. on the Immaculate… Next » 211: « Prev The Decree of Pope Pius IX. on the Immaculate… Next » 211”
  16. Schaff ANF/NPNF (Patristic) “NPNF1 Vol 5: Augustine — Anti-Pelagian — CHAP. 41.--EVEN IN JUDGMENT GOD'S MERCY (part 2): saying is rightly understood which in the gospel is read, "grace for grace,"[1]--that is, for those merits which grace has conferred.”
  17. Philippians (Presbyterian) “Jamieson, Fausset & Brown on Philippians 1:29: For--rather, a proof that this is an evident token from God of your salvation, "Because," &c. it is given--Greek, "it has been granted as a favor," or "gift of grace." Faith is the gift of God (Eph 2:8), not wrought in the soul by the will of man, but by the Holy Ghost (Joh 1:12-13). believe on him--"To believe Him," would merely mean to believe He speaks the truth. "To believe on Him," is to believe in, and trust through, Him to obtain eternal salvation. Suffering for Christ is not only not a mark of God's anger, but a gift of His grace.”
  18. CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 3, section 25: peace. This in the last resort is the hope of all believers, whatever their theory of justification may be. Whether Papist, Remonstrant, or Augustinian, they all cast their dying eyes on Christ. “As Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up; that whosoever believeth in him should not perish, but have eternal life.” Protestant Doctrine. 4. The common doctrine of Protestants on this subject is that faith is merely the instrumental cause of justification. It is the act of receiving and resting up”
  19. theology (Catholic (Scholastic)) “Aquinas, Summa Theologica, First Part of the Second Part (Prima Secundae), Of the Necessity of Grace, Art. 9: Article: Whether one who has already obtained grace, can, of himself and without further help of grace, do good and avoid sin? I answer that, As stated above (Article [5]), in order to live righteously a man needs a twofold help of God---first, a habitual gift whereby corrupted human nature is healed, and after being healed is lifted up so as to work deeds meritoriously of everlasting life, which exceed the capability of nature. Secondly, man needs the help of grace in order to be move”
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