The thief on the cross

Prologue
The Thief on the Cross

In the shadow of the cross, a dying thief encountered the boundless grace of God. With no time for works, rituals, or fruit—only a broken confession of guilt and sincere faith in the innocent Savior—he received the Lord’s promise: “Today you will be with me in paradise” (Luke 23:43). This powerful account proclaims that salvation is by grace through faith alone. Yet Scripture also calls every believer to run the race of faith with endurance, looking to Jesus, the author and perfecter of our faith (Hebrews 12:1-2). The thief’s eleventh-hour victory displays the instantaneous gift of saving faith, while the New Testament’s warnings remind us that final security belongs to those who abide in Christ and persevere to the end. In this study, we explore both the comfort of genuine faith and the solemn call to finish the race of faith by surrendering to Christ Jesus as Lord and Savior. 

The Thief on the Cross and the Race of Faith: Understanding Conditional Security

The account of the thief on the cross stands as one of the most powerful and comforting pictures of God’s grace in all of Scripture. In the final hours of his life, this condemned criminal received the promise of paradise—not through religious rituals, good works, or a lifetime of visible fruit, but through genuine repentance and faith in the Lord Jesus Christ. It affirms that salvation is by grace through faith alone from beginning to end, while also calling every believer to persevere in that same faith until the finish line.

The Thief’s Final Moments (Luke 23:39-43)

Crucified alongside Jesus were two thieves. One joined the mocking crowd, hurling insults at the Savior. The other, however, experienced a dramatic change of heart in his dying breaths. He rebuked his fellow criminal, saying, “Do you not fear God, since you are under the same sentence of condemnation? And we indeed justly, for we are receiving the due reward of our deeds; but this man has done nothing wrong” (Luke 23:40-41).

In those words we see true repentance: an honest acknowledgment of his own guilt and sin, coupled with a clear recognition of Jesus’ innocence and divine lordship. Turning to the Lord, he pleaded, “Jesus, remember me when you come into your kingdom” (v. 42). Jesus’ response is one of the most astonishing statements in the Gospels: “Truly, I say to you, today you will be with me in paradise” (v. 43).

This dying thief had no opportunity for baptism, restitution, church membership, or a long record of good deeds. He entered the race of faith in the final seconds of the race—and he crossed the finish line victorious.

Entering the Race Late, Finishing Strong

The writer of Hebrews urges us: “Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us, looking to Jesus, the founder and perfecter of our faith” (Hebrews 12:1-2).

The thief on the cross demonstrates that it is never too late to enter this race while breath remains. Though he began at the eleventh hour, he fixed his eyes on Jesus and trusted in Him completely. In that moment of sincere faith, Jesus became both the author and perfecter of the thief’s faith. The man who had lived a life deserving death received eternal life as a free gift of grace.

This account powerfully refutes any notion that salvation can be earned by human merit. The thief brought nothing but his guilt and a broken, believing heart. Grace met him there. It also refutes the idea that a deathbed conversion is somehow suspect or insufficient. Genuine faith, even in the final moments, saves.

Conditional Security for Those Still Running

While the thief’s story gloriously displays the instantaneous power of saving faith, the New Testament teaches that security for believers who are still running the race is conditional upon continued faith, abiding in Christ, and perseverance. Eternal security belongs fully and finally to those who finish the race—the overcomers who endure to the end.

Jesus Himself taught this reality in the vine and branches metaphor: “If anyone does not abide in me he is thrown away like a branch and withers; and the branches are gathered, thrown into the fire, and burned” (John 15:6). The apostle Paul echoed this when he wrote, “And you, who once were alienated and hostile in mind, doing evil deeds, he has now reconciled in his body of flesh by his death, in order to present you holy and blameless and above reproach before him, if indeed you continue in the faith, stable and steadfast, not shifting from the hope of the gospel” (Colossians 1:21-23, emphasis added).

The most sobering warnings come in Hebrews 10:26-39. After describing the new and living way opened by Christ’s blood, the writer warns:

“For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, but a fearful expectation of judgment… But we are not of those who shrink back and are destroyed, but of those who have faith and preserve their souls.”

These warnings are addressed to professing believers. They are not hypothetical. They underscore that genuine saving faith is persevering faith. As Jesus declared, “The one who endures to the end will be saved” (Matthew 24:13).

The Thief and the Race: Both Grace and Perseverance

The thief on the cross shows us the beginning of faith—initial justification by grace through faith. Those of us still running the race are called to demonstrate the continuance of that faith through obedience to the law of Christ (the law of love, Galatians 6:2), fruitfulness, vigilance against willful sin, and daily abiding in Jesus.

Grace initiates — The thief’s salvation was 100% by grace.

Grace sustains — The same grace that saves us also empowers us to run with endurance (Titus 2:11-12).

Grace perfects — At the finish line, grace presents us faultless before God’s presence with great joy (Jude 24).

There is no contradiction here. The New Covenant does not replace grace with works; it produces works through grace as evidence of living faith (Ephesians 2:8-10; James 2:14-26). The thief had no time to bear visible fruit, but his repentant faith was the root. For us who have longer to run, fruitfulness and perseverance become the biblical evidence that our faith is genuine.

Encouragement for Today’s Race

Dear believer, if you have begun the race by simple, trusting faith in Jesus, take heart. The same Lord who saved the thief in his final moments is mighty to keep you. Fix your eyes on Him. Abide in His Word. Walk in the Spirit. Put to death the deeds of the body. Fight the good fight of faith.

If you are wrestling with sin or drifting, hear the gracious call to return: “Return to me, and I will return to you” (Malachi 3:7; see also James 4:8). The race is not won by flawless performance but by continued dependence on the One who is both Author and Perfecter.

And if you have never truly trusted Christ, the thief’s story shouts hope: it is never too late while you still have breath. Repent and believe today.

The thief on the cross reminds us that salvation is all of grace—and that genuine grace always leads to persevering faith. May we run with endurance, looking to Jesus, until we too hear those words: “Well done, good and faithful servant… Enter into the joy of your master” (Matthew 25:21).