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Assurance of Salvation in the Westminster Confession: Can You Know You Are Saved?

Rev. C•D•F• Warrington, M.Div.
By Rev. C•D•F• Warrington, M.Div.

Ordained Minister, M.Div.

May 2, 2026

2 min read

Reformed
Westminster Confession open to chapter on assurance of salvation

Can a Christian know, in this life, that he or she is truly saved? The Roman Catholic Church answered: no — certainty of salvation is the sin of presumption. Much of modern evangelicalism answers: yes, automatically, the moment you pray a prayer. The Westminster Confession charts a careful course between these two errors in Chapter 18, 'Of the Assurance of Grace and Salvation.'

Assurance Is Possible

The Confession affirms clearly that genuine, infallible assurance is possible in this life: '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 assurance is not presumption — it is a gift of God grounded in the promises of Scripture, the inward evidence of grace in one’s life, and the testimony of the Holy Spirit.

But Not Automatic

At the same time, the Confession does not teach that assurance is the immediate possession of every believer. 'A true believer may wait long, and conflict with many difficulties before he be partaker of it.' Assurance may be shaken, diminished, or intermitted through sin, temptation, or the withdrawal of God’s felt presence — yet never to the point of utter despair for the truly regenerate. The Confession distinguishes between saving faith (which may be weak) and full assurance (which may be absent for a season).

The Pastoral Wisdom of Chapter 18

What makes this chapter so pastorally valuable is its realism. It does not promise a perpetual emotional certainty that many believers never experience. It does not leave the struggling saint with no comfort at all. It says: genuine assurance is possible, is worth pursuing, is grounded in objective realities (the promises of God, the work of Christ), and is confirmed by the Spirit’s inward testimony. For the believer who wonders whether he or she is truly saved, Chapter 18 is one of the most helpful sections in the entire Confession.

Tags:ReformedWestminstertheology

Frequently Asked Questions

What does the Westminster Confession teach about assurance of salvation?

Chapter XVIII of the Westminster Confession of Faith, 'Of the Assurance of Grace and Salvation,' teaches that genuine believers can attain 'infallible assurance of faith' in this life, grounded not in a special revelation but on the divine truth of God's promises, the inward evidence of saving graces (such as love, joy, peace, and perseverance), and the testimony of the Spirit of adoption bearing witness with the human spirit (Romans 8:16). The Confession insists this assurance is attainable and real, distinguishing it from mere presumption or wishful thinking, and connects it to the doctrine of election and perseverance.

Can a Christian lose assurance of salvation according to the Westminster Confession?

The Westminster Confession distinguishes between the certainty of salvation (which the elect cannot ultimately lose, per Chapter XVII on perseverance) and the experience of assurance (which believers may lose temporarily due to sin, spiritual neglect, or divine testing). Chapter XVIII acknowledges that true believers 'may have the assurance of their salvation divers ways shaken, diminished, and intermitted' through specific sins, temptations, or God's withdrawal of the light of His countenance. However, the Confession is equally clear that believers are not cast 'into utter darkness' because the seed of faith and the Spirit's work remain even when assurance falters.

How does Reformed theology's view of assurance differ from Roman Catholic teaching?

The Council of Trent (1545–1563) taught that, absent a special revelation, no one can know with certainty that he or she is among the predestined and will persevere to the end, warning against the 'rash presumption' of such confidence. The Westminster Confession directly contradicts this by teaching that assurance of salvation is not presumptuous but is rather the normal expectation for mature believers, grounded in God's promises and the Spirit's witness. This difference reflects the deeper divide over justification: if righteousness before God is entirely Christ's imputed righteousness received through faith, assurance rests on Christ's work rather than on the uncertain progress of one's own sanctification.

What role does the Holy Spirit play in assurance according to the Westminster Confession?

The Westminster Confession grounds assurance partly in 'the testimony of the Spirit of adoption witnessing with our spirits that we are the children of God' (Romans 8:15–16), making the Holy Spirit's internal witness an indispensable component of genuine assurance. This is not presented as an emotional feeling alone but as the Spirit's objective testimony to the reality of one's adoption and justification. The Confession connects this to the broader Reformed understanding of the Spirit's work: He regenerates, calls, justifies, and adopts, and His ongoing presence is itself the seal and guarantee of the believer's inheritance (Ephesians 1:13–14).

Why does the Westminster Confession say assurance is not 'of the essence of faith'?

Chapter XVIII of the Westminster Confession states that assurance is not 'of the essence of saving faith,' meaning that a person can possess genuine saving faith without yet having attained full assurance that they are saved. This was pastorally important: many sincere believers struggle with doubt, and the Confession wanted to affirm that such doubters can still be true Christians. However, the Confession does insist that assurance is attainable and is the believer's duty and privilege to pursue, since it produces 'peace and joy in the Holy Ghost, love and thankfulness to God, and strength and cheerfulness in the duties of obedience'—practical fruits that make the pursuit of assurance a matter of Christian growth rather than optional.

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