What is assurance of salvation and how can I have it?
Question 7001
Few questions trouble sincere believers more than the question of assurance. “How can I know I’m truly saved?” “What if I’m deceived about my spiritual condition?” “Is it even possible to have certainty about eternal matters?” These questions, while sometimes painful, reflect a heart that takes salvation seriously. The good news is that Scripture has much to say about assurance, and God wants His children to possess confident knowledge of their standing with Him.
The doctrine of assurance addresses whether believers can know with certainty that they possess eternal life. This is distinct from the doctrine of eternal security, which asks whether genuine believers can lose their salvation. A person might believe in eternal security theoretically while still lacking personal assurance that they are among the saved. The Scriptures address both truths: God keeps His own secure, and He wants them to know they are His.
The Biblical Basis for Assurance
The clearest statement on assurance comes from the pen of the Apostle John: “I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life” (1 John 5:13). The Greek verb here is εἰδῆτε (eidēte), meaning to know with certainty, to perceive clearly. John does not say that believers may hope or wish or guess. He says they may know.
This was John’s stated purpose for writing his entire first epistle. The whole letter provides tests by which believers can examine themselves and gain confidence in their salvation. John Calvin remarked on this verse: “God therefore wills that we should feel assured of our salvation, and this assurance is not idle or dead, but produces in us a lively hope.”
The Lord Jesus Himself spoke of this assurance. In John 10:27-28, He declares: “My sheep hear my voice, and I know them, and they follow me. I give them eternal life, and they will never perish, and no one will snatch them out of my hand.” Notice the certainties here: His sheep hear, follow, receive eternal life, will never perish, and cannot be snatched away. This is not language of probability but of absolute assurance.
Paul wrote to the Romans: “The Spirit himself bears witness with our spirit that we are children of God” (Romans 8:16). The Holy Spirit provides an internal testimony to believers that they belong to God’s family. This witness is not a feeling that comes and goes but a settled conviction worked by the Spirit through Scripture and experience.
Three Grounds of Assurance
Theologians have historically identified three grounds upon which assurance rests. These form a tripod; all three work together to provide a stable foundation for the believer’s confidence.
The Objective Promises of Scripture
The first ground is the objective promises of Scripture. God has made specific promises to those who trust in His Son. John 3:16 promises that “whoever believes in him should not perish but have eternal life.” John 6:37 records Jesus saying, “whoever comes to me I will never cast out.” Acts 16:31 declares, “Believe in the Lord Jesus, and you will be saved.” These promises are unconditional for those who meet the single condition: genuine faith in Jesus.
Lewis Sperry Chafer emphasised this ground of assurance: “The Word of God is the primary basis for the believer’s assurance. It presents clearly the ground of acceptance before God, which ground is the finished work of Christ. To the exact extent that the Word is believed, assurance will be present.”
The Internal Witness of the Holy Spirit
The second ground is the internal witness of the Holy Spirit. As Romans 8:16 states, the Spirit testifies with our spirit that we are God’s children. This is not merely emotional feeling but a deep-seated conviction that accompanies genuine faith. The Spirit produces in believers what Paul calls “the fruit of the Spirit” (Galatians 5:22-23)—love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control. These qualities, while imperfectly manifested, provide evidence that the Spirit indwells.
John Murray wrote: “The witness of the Spirit is that sovereign and gracious activity of the Holy Spirit whereby he convinces the regenerate that they are the children of God.”
The Evidence of a Changed Life
The third ground is the evidence of a changed life. First John is filled with tests by which believers may examine themselves. Do I confess my sins (1:9)? Do I obey God’s commands (2:3-6)? Do I love other believers (3:14)? Do I believe that Jesus is the Christ (5:1)? Have I overcome the world (5:4)? These are not works that earn salvation but fruits that evidence it.
Charles Ryrie helpfully explains: “Good works do not produce salvation, but salvation certainly produces good works. If no works, then one may legitimately question whether there was genuine salvation.”
The Distinction Between Security and Assurance
It is important to distinguish between the objective reality of security and the subjective experience of assurance. Eternal security is based on what God has done and will do. Assurance is the believer’s awareness of that security.
A person may be truly saved yet lack assurance for various reasons: spiritual immaturity, unconfessed sin, exposure to false teaching that makes assurance seem presumptuous, temperamental tendencies toward doubt, or satanic attack. Conversely, a person may feel assured yet not be truly saved if their assurance rests on false grounds such as religious performance, emotional experiences, or mere mental assent without genuine faith.
John Walvoord observed: “Assurance is based on the Word of God as the ground, the work of the Holy Spirit as the means, and the changed life as the evidence. When these three agree, the believer has grounds for full assurance.”
How to Gain Assurance
For those lacking assurance, several biblical pathways exist. First, examine the object of your faith. Is your trust in Jesus alone for salvation, or have you added anything to it? Is your hope in His finished work on the cross, or partly in your own works or religious performance? Assurance comes when faith rests on the right foundation.
Second, review God’s promises and take God at His word. If you have genuinely trusted Jesus, then John 6:37 applies to you: He will never cast you out. Romans 10:13 applies: everyone who calls on the name of the Lord will be saved. God cannot lie (Titus 1:2). If He has promised salvation to those who believe, and you have believed, then you are saved.
Third, examine the fruit of your life, but do this carefully. The question is not whether you are perfect but whether you see evidence of change. Do you have new desires? Do you grieve over sin in a way you did not before? Do you love other believers? Is there a hunger for God’s Word? These are evidences of the Spirit’s work.
Warren Wiersbe offers pastoral wisdom here: “If the Spirit is bearing witness, there will be fruit to prove it. But be careful about being too introspective. Satan loves to make us doubt our salvation. The strongest assurance comes from looking away from ourselves to Christ and His Word.”
Fourth, confess any known sin. Unconfessed sin grieves the Holy Spirit and can cloud assurance. 1 John 1:9 promises: “If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.” Fellowship with God is restored through confession, and with restored fellowship comes renewed assurance.
Fifth, if doubts persist, pray for the Spirit’s witness. Jesus promised that the Father gives the Holy Spirit to those who ask (Luke 11:13). Ask God to confirm His work in your heart, to strengthen your faith, and to grant you the assurance He wants you to have.
False Grounds of Assurance
While pursuing genuine assurance, believers must guard against false assurance that rests on unstable foundations. Some assume they are saved because they prayed a prayer, walked an aisle, were baptised, joined a church, or had an emotional experience. While these may accompany genuine conversion, they are not the grounds of salvation. Salvation is by grace through faith in Jesus alone.
Others base their assurance on being “good people” or living moral lives. But Isaiah 64:6 declares that “all our righteous deeds are like a polluted garment.” Ephesians 2:8-9 excludes works as the basis of salvation. Morality without faith in Jesus does not save.
Still others rest on family heritage—being born into a Christian family or having godly parents. But Jesus told Nicodemus, a religious leader, that he must be born again (John 3:3). Faith cannot be inherited; it must be personally exercised.
J. Dwight Pentecost warned: “Satan is quite willing for a person to feel assured of salvation as long as that assurance rests on a false foundation. Many will say ‘Lord, Lord’ in that day who will hear ‘I never knew you.'”
Assurance and the Fear of Presumption
Some believers avoid assurance because they fear it would be presumptuous to claim certainty about eternal matters. This concern, while understandable, misunderstands the nature of biblical assurance.
Presumption says, “I am saved regardless of what God says or what I believe.” Assurance says, “I am saved because of what God says and because I have believed it.” The difference is fundamental. Presumption ignores God’s conditions; assurance embraces them. Presumption is self-focused; assurance is Christ-focused. Presumption leads to careless living; true assurance leads to grateful obedience.
As John Calvin noted: “We do not deny that it is lawful and proper to examine ourselves that we may distinguish living faith from dead… But we deny that such an examination ought to shake our faith or diminish our confidence in the Lord.”
The Practical Fruit of Assurance
When believers possess assurance, the benefits are immense. First, assurance produces peace. Anxiety about one’s eternal destiny is replaced by confidence in God’s promises. The heart can rest in what Jesus has accomplished.
Second, assurance enables effective service. Believers who are uncertain about their own salvation struggle to share the Gospel with confidence. How can they commend a Saviour they are not certain has saved them? But those who know they are saved can testify freely to what God has done.
Third, assurance promotes holiness. Some fear that assurance leads to careless living—”If I’m saved no matter what, why bother living for God?” But the opposite is true. Those who are genuinely assured of God’s love are motivated by gratitude to live for Him. It is doubt, not assurance, that weakens holy living.
Fourth, assurance brings joy in trials. Knowing that nothing can separate us from God’s love (Romans 8:38-39), believers can face difficulties with hope. Death itself loses its terror when we know that to be absent from the body is to be present with the Lord (2 Corinthians 5:8).
Historical Perspectives
The doctrine of assurance has a rich history in Christian thought. The Westminster Confession of Faith (1646) articulated the Reformed understanding: “Such as truly believe in the Lord Jesus, and love him in sincerity, endeavouring to walk in all good conscience before him, may in this life be certainly assured that they are in the state of grace.”
This stood against Roman Catholic teaching, which held that assurance was generally not possible apart from special revelation and that claiming certainty was presumption. The Reformers recovered the biblical teaching that assurance is both possible and desirable.
In the dispensational tradition, Chafer emphasised the distinction between security and assurance: “Security is the work of God for the believer; assurance is the attitude of the believer toward the work of God. The one is objective; the other is subjective. The one is unchangeable; the other may fluctuate.”
Conclusion
Can you know you are saved? Yes, absolutely yes. God wants you to know. He inspired Scripture partly for this purpose: “that you may know that you have eternal life” (1 John 5:13). He sent the Spirit to testify with your spirit. He produces fruit in your life that evidences His work.
If you lack assurance today, do not despair. Examine your faith: is it in Jesus alone? Review God’s promises: they are for all who believe. Look for evidence of change: not perfection, but direction. Confess any known sin. Pray for the Spirit’s witness.
And remember, assurance ultimately rests not on your ability to assess yourself but on the faithfulness of God who has promised that whoever believes in His Son has eternal life. Your confidence is not in the strength of your grip on Him but in the strength of His grip on you. Jesus said of His sheep: “I give them eternal life, and they will never perish, and no one will snatch them out of my hand” (John 10:28). That includes you, if you have come to Him in faith. Rest in that promise. He will never let you go.
“I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life.” 1 John 5:13
Bibliography
- Calvin, John. Institutes of the Christian Religion. Translated by Henry Beveridge. Edinburgh: Calvin Translation Society, 1845.
- Calvin, John. Commentaries on the Catholic Epistles. Edinburgh: Calvin Translation Society, 1855.
- Chafer, Lewis Sperry. Salvation. Grand Rapids: Zondervan, 1917.
- Chafer, Lewis Sperry. Systematic Theology. 8 vols. Dallas: Dallas Seminary Press, 1947.
- Lloyd-Jones, D. Martyn. Spiritual Depression: Its Causes and Cure. Grand Rapids: Eerdmans, 1965.
- Murray, John. Redemption Accomplished and Applied. Grand Rapids: Eerdmans, 1955.
- Pentecost, J. Dwight. Things Which Become Sound Doctrine. Grand Rapids: Zondervan, 1965.
- Ryrie, Charles C. So Great Salvation. Wheaton: Victor Books, 1989.
- Walvoord, John F. The Holy Spirit. Grand Rapids: Zondervan, 1954.
- Westminster Assembly. The Westminster Confession of Faith. 1646.
- Wiersbe, Warren W. Be Confident: Hebrews. Colorado Springs: David C Cook, 1982.
