What is assurance of salvation and how can I have it?

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Question 07001

Few questions trouble sincere believers more than the question of assurance. How can I know I am truly saved? What if I am deceived about my own spiritual condition? Is it even possible to have certainty about something as weighty as eternal life? These questions, painful as they sometimes are, usually reflect a heart that takes salvation seriously. The encouraging news is that Scripture has a great deal to say here, and God genuinely wants His children to possess confident knowledge of where they stand with Him.

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Assurance and Security Are Not the Same Thing

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 a genuine believer can lose their salvation. A person might hold to eternal security as a theological conviction while still struggling to feel assured that they personally are among the saved. Scripture addresses both realities. God keeps His own secure, and He also wants them to know they are His.

The Biblical Basis for Assurance

The clearest statement comes from 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 is eidēte (εἰδῆτε), meaning to know with certainty, to perceive clearly. John does not say believers may hope or wish or guess. He says they may know. This was his stated purpose for writing the entire first epistle, which provides tests by which believers can examine themselves and gain confidence in their salvation.

Jesus Himself spoke in the same register. 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.” The certainties stack up: His sheep hear, follow, receive eternal life, will never perish, and cannot be taken from Him. This is not the language of probability. Paul adds the Spirit’s role: “The Spirit himself bears witness with our spirit that we are children of God” (Romans 8:16). This witness is not a feeling that flickers on and off but a settled conviction the Spirit works through Scripture and Christian experience.

The Three Grounds of Assurance

Assurance has historically been understood to rest on three grounds that work together as a stable foundation. The first is the objective promises of Scripture. God has made specific commitments to those who trust 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.” These promises are unconditional for everyone who meets the single condition of genuine faith in Jesus. Lewis Sperry Chafer put it directly: the Word of God is the primary basis for assurance, and to the exact extent that the Word is believed, assurance will be present.

The second ground is the internal witness of the Holy Spirit. As Romans 8:16 states, the Spirit testifies with our spirit that we belong to God’s family. This is not mere emotional sensation but a deep-seated conviction that accompanies genuine faith, accompanied by what Paul calls the fruit of the Spirit (Galatians 5:22-23). Even when imperfectly displayed, love, joy, peace, and the rest provide real evidence that the Spirit indwells a person.

The third ground is the evidence of a changed life. First John is filled with tests for self-examination. 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)? These are not works that earn salvation but fruits that evidence it. Charles Ryrie expressed it well: good works do not produce salvation, but salvation certainly produces good works, and where there are no works at all one may legitimately question whether genuine salvation ever occurred.

Why a Saved Person May Lack Assurance

It helps to keep the objective reality of security separate from the subjective experience of assurance. Security rests on what God has done and will do. Assurance is the believer’s awareness of that security. A genuinely saved person may lack assurance for any number of reasons: spiritual immaturity, unconfessed sin, exposure to teaching that makes assurance feel presumptuous, a temperament inclined toward doubt, or spiritual attack. The reverse is also possible. A person may feel assured while not being saved at all, if that assurance rests on false grounds such as religious performance, emotional experience, or bare mental assent without real faith.

How to Gain Assurance

For those lacking assurance, Scripture marks out a clear path. Begin by examining the object of your faith. Is your trust in Jesus alone, or have you quietly added something to it, partly resting in your own works or religious performance? Assurance comes when faith rests on the right foundation. Then take God at His word. If you have genuinely trusted Jesus, then John 6:37 applies to you, and so does Romans 10:13: 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 whether or not your feelings have caught up.

Examine the fruit of your life as well, but do this carefully. The question is not whether you are perfect but whether you can see evidence of change. Are there new desires? Do you grieve over sin in a way you did not before? Is there a hunger for God’s Word and a love for His people? Warren Wiersbe offers wise pastoral counsel here, warning against excessive introspection, since Satan delights in making believers doubt their salvation. The strongest assurance, Wiersbe noted, comes from looking away from ourselves to Christ and His Word. Alongside this, confess any known sin, since unconfessed sin grieves the Spirit and clouds assurance, and 1 John 1:9 promises cleansing and restored fellowship. And if doubts persist, ask. Jesus promised that the Father gives the Holy Spirit to those who ask Him (Luke 11:13).

False Grounds to Guard Against

While pursuing genuine assurance, believers must beware of false assurance resting on unstable foundations. Some assume they are saved because they prayed a prayer, walked an aisle, were baptised, joined a church, or had a stirring emotional experience. These may well accompany genuine conversion, but they are not the ground of salvation, which is by grace through faith in Jesus alone. Others rest on being decent, moral people, yet Ephesians 2:8-9 excludes works as the basis of salvation. Still others lean on family heritage, 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, as a friend of mine used to say: “God has no grandchildren”. J. Dwight Pentecost warned soberly that Satan is quite willing for a person to feel assured of salvation as long as that assurance rests on a false foundation.

Assurance Is Not Presumption

Some believers shy away from assurance, fearing it would be presumptuous to claim certainty about eternal things. The concern is understandable but mistaken. 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.” Presumption ignores God’s conditions and leads to careless living. Assurance embraces those conditions and leads to grateful obedience. Far from weakening holiness, genuine assurance strengthens it, because those who know they are loved are moved by gratitude to live for the One who loved them. It is doubt, not assurance, that drains the strength out of holy living.

So, now what?

Can you know you are saved? Yes. God wants you to know, and He inspired Scripture partly for this very purpose, “that you may know that you have eternal life.” If you lack assurance today, do not despair. Examine your faith and ask whether it rests in Jesus alone. Review God’s promises, which are held out to everyone who believes. Look for evidence of change, which means direction rather than perfection. Confess any known sin and ask for the Spirit’s witness.

Above all, remember that assurance ultimately rests not on your ability to assess yourself but on the faithfulness of the 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.” If you have come to Him in faith, that promise has your name on it. 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

• 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.
• Wiersbe, Warren W. Be Confident: Hebrews. Colorado Springs: David C Cook, 1982.