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Assurance of Faith in Jesus Christ through Scripture

Assurance of faith refers to a firm conviction in the truth of God's promises and one's salvation through Jesus Christ. This conviction is rooted in Scripture and is understood to be a gift of the Holy Spirit [1, 3]. The concept is often described as a "full assurance" (Greek: plerophoria), implying a completeness of faith that leaves no room for doubt [1].

The biblical foundation for assurance is found in various passages. For instance, the resurrection of Jesus is presented as God's pledge that His revelation is true and worthy of acceptance (Acts 17:31) [1]. The apostle Paul speaks of knowing the "holy scriptures" from childhood, which are "able to make thee wise unto salvation through the faith which is in Christ Jesus" (2 Timothy 3:15 KJV) [4]. This suggests that knowledge of Scripture is instrumental in developing saving faith and, by extension, assurance. The Geneva Bible of 1599 renders this verse similarly, emphasizing the Scriptures' ability to make one "wise unto saluation, through the faith which is in Christ Iesus" [2].

Assurance is produced by faith itself, as indicated in Ephesians 3:12, 2 Timothy 1:12, and Hebrews 10:22 [3]. It is made full by hope (Hebrews 6:11, 19) and confirmed by love (1 John 3:14, 19; 4:18) [3]. The prophet Isaiah connects righteousness with assurance, stating that "the work of righteousness shall be peace; and the effect of righteousness quietness and assurance for ever" (Isaiah 32:17 KJV). This verse is interpreted by Jamieson, Fausset & Brown as meaning that peace, both internal and external, is the effect of righteousness [14].

The Scriptures are considered the inspired Word of God, given by the Holy Spirit (2 Timothy 3:16; Acts 1:16; 2 Peter 1:21) [5]. Christ Himself sanctioned the Scriptures by appealing to them and teaching from them (Matthew 4:4; Mark 12:10; Luke 24:27) [5]. This divine origin and Christ's endorsement underscore their authority as a source of assurance.

Theological traditions have articulated the nature of assurance in different ways. John Calvin, a prominent Reformed theologian, frequently commented on various biblical texts, including those related to faith and God's promises [7, 8, 12, 15, 17, 18]. While the specific nuances of his teaching on assurance are not detailed in the provided excerpts, his extensive commentary on Scripture implies a deep reliance on the biblical text for understanding such doctrines. Similarly, John Chrysostom, an early Church Father revered in Eastern Orthodoxy, also engaged deeply with Scripture in his homilies, including passages related to faith and Christian life [9, 11, 13, 16].

The Easton's Bible Dictionary defines faith as the "persuasion of the mind that a certain statement is true," with its primary idea being trust [6]. one tradition notes that faith admits of many degrees, "up to full assurance of faith," which is in accordance with the evidence on which it rests [6]. Knowledge is an essential element of faith, sometimes even equated with it, though faith also includes assent [6]. This suggests that a clear understanding of biblical truths contributes to a stronger assurance.

The Jamieson, Fausset & Brown Commentary on 1 Thessalonians 1:3 describes "work of faith" as the "working reality of your faith; its alacrity in receiving the truth, and in evincing itself by its fruits" [10]. This implies that assurance is not merely a passive belief but an active, living faith that produces good works. The commentary further notes that "the work of faith" in 2 Thessalonians 1:11 implies its "perfect development" [10].

Assurance is also understood as a privilege of believers, encompassing their election (Psalm 4:3; 1 Thessalonians 1:4), redemption (Job 19:25), adoption (Romans 8:16; 1 John 3:2), salvation (Isaiah 12:2), eternal life (1 John 5:13), the unalienable love of God (Romans 8:38-39), and union with God and Christ (1 Corinthians 6:15; 2 Corinthians 13:5; Ephesians 5:30; 1 John 2:5; 4:13) [3]. This comprehensive list highlights the broad scope of what assurance entails for the believer.

Adam Clarke, a Methodist commentator, notes that assurance is a conviction of the truth of the Christian religion and the fulfillment of God's promises, leading believers to speak and testify of their deliverance from God [19]. This perspective emphasizes the active and declarative nature of assurance, where belief translates into outward expression and confidence in God's faithfulness.

Sources

  1. 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 ”
  2. II Timothy “II Timothy 3:15 (Geneva1599) — And that thou hast knowen the holy Scriptures of a childe, which are able to make thee wise vnto saluation, through the faith which is in Christ Iesus.”
  3. 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 ”
  4. King James Version “[KJV] 2 Timothy 3:15 — And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.”
  5. Torrey's Topical Textbook “Torrey's Topical Textbook: Scriptures, The — Given by inspiration of God -- 2Ti 3:16. Given by inspiration of the Holy Spirit -- Ac 1:16; Heb 3:7; 2Pe 1:21. Christ sanctioned, by appealing to them -- Mt 4:4; Mr 12:10; Joh 7:42. Christ taught out of -- Lu 24:27. Are called the Word. -- Jas 1:21-23; 1Pe 2:2. Word of God. -- Lu 11:28; Heb 4:12. Word of Christ. -- Col 3:16. Word of truth. -- Jas 1:18. Holy Scriptures. -- Ro 1:2; 2Ti 3:15. Scripture of truth. -- Da 10:21. Book. -- Ps 40:7; Re 22:19. Book of the Lord. -- Isa 34:16. Book of the law. -- Ne 8:3; Ga 3:10. Law of the Lord. -- Ps 1:2; Isa”
  6. 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 ”
  7. CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 2, section 53.2: 64:7 66:24 Jeremiah 4:31 5:8 5:28 7:4 7:4 9:1 10:23 10:24 10:24 11:21 17:1 17:5 18:16 19:6 19:8 22:24 22:28 25:9 25:13 25:18 28:10 28:11 30:11 31:15 43:2 48:2 50:11 Lamentations 1:7 2:5 2:8 3:29 Ezekiel 15:3 16:26 20:11 20:24 20:25 26:2 26:14 37:1 43:15 43:15 47:11 Daniel 5:28 5:30 5:31 7:10 7:17 8:20 Hosea 1:7 6:4 8:14 9:6 13:3 Joel 1:13 2:13 2:23 2:28 Amos 1:3 3:6 4:1 4:1 5:10 5:19 8:11 Micah 1:3 1:11 2:11 7:9 7:16 Nahum 3:8 Habakkuk 2:1 2:1 2:1 2:2 3:2 3:2 3:13 Zechariah 9:14 13:4 14:3 Malachi 1:4 1:11 4:2 Matthew 2:14 3:12 3:12 3:12 3:12 ”
  8. CCEL (Reformed) “Calvin, Commentary on Genesis, Vol. 1 (Gen 1-23), section 28.1: Index of Scripture References Genesis 1:1-6 1:1-31 1:2 1:28 1:29-30 2:1 2:1-25 2:15 2:19 3:1 3:1-24 3:7 3:16 4:1 4:1-26 4:7 5:1 5:1-32 6:1 6:1-22 6:11-16 7:1-24 7:11 8:1-22 9:1 9:1 9:1-29 9:2 9:24 10 10:1 10:1 10:1-32 10:21 11:1 11:1 11:1-32 11:28 12:1 12:1 12:1 12:1-20 12:4 12:4 12:6 13:1 13:1-20 14:1-24 15:1-21 15:7 16:1-16 16:2 16:8 17:1 17:1 17:1 17:1 17:1-27 18:1 18:1 18:1-33 18:19 19:1-38 20:1 20:1 20:1-18 21:1-34 21:15 22:1-24 22:18 23:1-20 24:31 25:1 25:13-16 35:7 48:1 Exodus 6:3 12:40 Leviticus 7:18 17:4 18:25 Numbers 6:2”
  9. CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Acts & Romans: Index of Scripture References Genesis 1:26 2:10 2:18 2:21 2:21 2:24 2:24 2:24 3:5 3:6 3:11 3:16 3:16 3:16 3:19 3:19 4 4:2 4:6 4:7 4:7 4:7 4:9 4:9 4:10 4:10 4:10 4:11 4:14 6:3 6:3 6:9 9:5 9:20 9:22 11:8 11:31 12:3 12:7 12:7 14:14 15:12 15:13-14 18:3 18:3 18:3 18:7 18:17 18:19 18:27 18:33 21:12 22:3 22:18 25:33 27:27 27:41 27:45 28:12 28:20 29:23 30:1-2 31:7 31:15 31:40 32:10 32:21 32:28 32:29 33:19 37:18 39:1-20 40:23 41:40 41:42-43 42:21 45:5 45:5 45:9 45:24 48:16 49:7 60:8 Exodus 1:14 1:22 2:11 2:13 2:15 2:22 3:1 3:2 3:2 4:10 4:22 5:2 9:11 17:4 18:2”
  10. 1 Thessalonians (Presbyterian) “Jamieson, Fausset & Brown on 1 Thessalonians 1:3: work of faith--the working reality of your faith; its alacrity in receiving the truth, and in evincing itself by its fruits. Not an otiose assent; but a realizing, working faith; not "in word only," but in one continuous chain of "work" (singular, not plural, works), Th1 1:5-10; Jam 2:22. So "the work of faith" in Th2 1:11 implies its perfect development (compare Jam 1:4). The other governing substantives similarly mark respectively the characteristic manifestation of the grace which follows each in the genitive. Faith, love, and hope, are the ”
  11. CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on John & Hebrews: Index of Scripture References Genesis 1:1 1:2 1:3 1:20 1:26 1:26 2:7 2:17 2:18 3:5 3:9 3:9 3:10 3:16 3:18 3:19 4:4 4:7 4:7 4:9 4:10 6:2 6:5 6:9 7:1 11:4 12:1 12:7 12:7 13:15 13:15 15:5 15:6 17:14 18 18 18:15 18:17 18:21 18:21 21:12 22:1 22:1-2 22:12 23:4 25:27 26:18-22 27:41 28:20 37:7 37:9 37:10 47:9 47:9 47:31 49:9 Exodus 2:14 2:14 2:14-15 3:6 3:14 6:9 12:3 12:46 14:21 17:12 17:12 19 19:16 19:16 19:18 19:19 19:19 19:19 19:20 19:20 20:9 20:13 20:19 20:21 23:3 32:10 33:13 33:20 35:23 Leviticus 15:18 Numbers 5 6:3 9:12 11:12 14:3 14:29 16:5 17:12 Deu”
  12. CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 1, section 23.2: 62:10 65:20 65:24 Jeremiah 1:6 1:17 2:21 2:21 7:4 7:4 7:21 7:22 9:23-24 9:26 10:14 17:5 17:5 22:7 23:5 23:19 23:36 25:11-12 29:10 30:9 30:9 31:34 32:18 33:15 41:5 48:7 48:13 48:29 48:30 48:32 48:32 48:32 48:34 Lamentations 2:22 3:22 Ezekiel 4:16 13:9 18:20 20:22 34:23 34:23 36:25 37:11-12 37:16 37:24 37:24 47:1 47:1 Daniel 2:44 7:10 7:14 7:27 9:24 9:27 Hosea 2:5 2:13 2:18 2:19-20 2:23 3:4 3:5 6:6 13:11 14:2 14:9 Joel 2:31 2:32 2:32 Amos 2:4-5 3:11 5:11 5:18 5:20 5:21 6:11 9:11 9:11 Jonah 1:2 3:10 Micah 1:16 5:10 6:7-8 7:8 Habakkuk 1:16 2:2 2:”
  13. CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Acts & Romans: 1:19 1:20 1:20 2:1-2 2:2 2:8 2:8 2:9 2:9 2:12 2:14 2:14 2:15 3:2-9 3:5 3:8-12 3:16 4:13 4:13 4:19 5:5 5:6 5:16 5:20 5:23 5:23 6:2 6:8 6:9 6:9 6:10 6:10 6:13 2 Timothy 1:5 1:5 1:16 2:9 2:9 3:2 3:12 3:15 4:6 4:6 4:10 4:11 4:11 4:13 4:15 4:17 4:20 Titus 1:7-9 1:12 1:12 1:16 2:12 3:5 Philemon 1:1 1:2 1:2 1:9 1:22 5:13 Hebrews 1:5 1:14 2:2 2:2 5:11-12 6:9 8:11 8:13 9:16 9:26 9:26-28 10:12 10:24 10:28-29 10:28-29 10:29 10:34 10:37 11:31 12:2 12:24 12:29 13:3 13:3 13:10 13:17 13:17 13:21 13:22 13:24 James 1:9 1:18 2:6 2:23 3:4 4:6 5:14-15 5:17 1 Peter 3:21 ”
  14. Isaiah (Presbyterian) “Jamieson, Fausset & Brown on Isaiah 32:17: work--the effect (Pro 14:34; Jam 3:18). peace--internal and external.”
  15. CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 1, section 29.2: 62:10 65:20 65:24 Jeremiah 1:6 1:17 2:21 2:21 7:4 7:4 7:21 7:22 9:23-24 9:26 10:14 17:5 17:5 22:7 23:5 23:19 23:36 25:11-12 29:10 30:9 30:9 31:34 32:18 33:15 41:5 48:7 48:13 48:29 48:30 48:32 48:32 48:32 48:34 Lamentations 2:22 3:22 Ezekiel 4:16 13:9 18:20 20:22 34:23 34:23 36:25 37:11-12 37:16 37:24 37:24 47:1 47:1 Daniel 2:44 7:10 7:14 7:27 9:24 9:27 Hosea 2:5 2:13 2:18 2:19-20 2:23 3:4 3:5 6:6 13:11 14:2 14:9 Joel 2:31 2:32 2:32 Amos 2:4-5 3:11 5:11 5:18 5:20 5:21 6:11 9:11 9:11 Jonah 1:2 3:10 Micah 1:16 5:10 6:7-8 7:8 Habakkuk 1:16 2:2 2:”
  16. CCEL/NPNF (Eastern Orthodox) “John Chrysostom, Homilies on Galatians–Colossians–Thessalonians: Index of Scripture References Genesis 1:11 1:11 1:26 1:26 1:26 1:27 1:27 1:27 1:31 1:31 2:2 2:7 2:17 2:17 2:18 2:23 2:24 2:24 2:24 3:5 3:16 3:24 4 4:9 4:14 6:2 6:3 6:4 6:9 6:12 7:7 8:21 12:1 12:4 12:16 13:10 13:10-11 14:14 14:21-23 15:16 16:5 16:6 17:8 18:11 18:12 18:14 18:21 19:13 19:14 19:24 21:10 21:12 21:12 22:7-8 22:16 22:18 22:18 24:1-67 24:22 24:65 25:21 25:21 26:4 27:46 28:1 28:13 31:42 31:45 32:48 35:18 37:9-10 37:20 39:1 39:6 40:4 40:7 40:8 40:14-15 40:22 41 41:16 42:36 43:14 43:30 45:5 48:15-16 49:9 64:28 Exodus 2:11 2”
  17. CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 1, section 23.4: 29:10 30:9 30:9 31:34 32:18 33:15 41:5 48:7 48:13 48:29 48:30 48:32 48:32 48:32 48:34 Lamentations 2:22 3:22 Ezekiel 4:16 13:9 18:20 20:22 34:23 34:23 36:25 37:11 37:12 37:16 37:24 37:24 47:1 47:1 Daniel 2:44 7:10 7:14 7:27 9:24 9:27 Hosea 2:5 2:13 2:18 2:19 2:20 2:23 3:4 3:5 6:6 13:11 14:2 14:9 Joel 2:31 2:32 2:32 Amos 2:4 2:5 3:11 5:11 5:18 5:20 5:21 6:11 9:11 9:11 Jonah 1:2 3:10 Micah 1:16 5:10 6:7 6:8 7:8 Habakkuk 1:16 2:2 2:2 Zephaniah 1:5 1:7 Haggai 2:9 Zechariah 2:8 2:8 3:2 6:12 Malachi 2:10 4:3 4:4 Matthew 1:5 3:2 4:15 4:16 5:10 5:11 ”
  18. CCEL (Reformed) “Calvin, Commentary on Isaiah, Vol. 2, section 53.1: Index of Scripture References Genesis 1:1 1:27 1:27 3:17 3:17 3:18 4:11 4:13 4:14 6:5 7:11 8:1 10:4 10:11 11:29 11:31 11:31 12:1 12:1 12:17 14:6 14:16 15:1 17:7 17:7 19:24 19:37 20:2 20:8 20:14 21:2 21:5 25:1 25:14 25:14 27:38 27:38 32:3 32:10 32:12 36:8 36:9 Exodus 3:8 7:13 8:15 13:3 13:5 13:8 13:14 13:17 14:14 14:21 14:22 15:10 17 18:21 19:5 19:6 19:6 19:6 19:6 20:1 20:2 20:24 20:25 23:32 27:1 29:45 33:3 34:6 34:6 34:15 34:30 Leviticus 19:9 19:10 26:3-13 26:8 26:12 26:12 26:16 Numbers 3:1-4:49 10:36 12:6 13:22 23:19 24:13 30:3 32:34 Deutero”
  19. 2 Corinthians (Methodist/Wesleyan) “Adam Clarke on 2 Corinthians 4:13: We having the same spirit of faith - As David had when he wrote Psa 116:10 : I believed, therefore have I spoken: we also believe that we shall receive the fulfillment of all God's promises; and being fully convinced of the truth of the Christian religion, we speak and testify that our deliverance is from God; and that he does not fail those who trust in him, and that he saves to the uttermost them who come unto him through Christ Jesus.”
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