The jailer believed because he understood and trusted Paul's gospel — that Christ died for sins and rose from the dead.
Paul's answer, "Believe on the Lord Jesus Christ," implied the full gospel message he preached everywhere: Christ died for our sins, was buried, and rose again the third day. The jailer was a Gentile whom God had turned to, and he responded in faith to that grace message — not to a repentance-and-baptism kingdom program, which was for Israel. His immediate care for Paul and Silas, his baptism, and his rejoicing show that he believed the gospel he had been taught.
Acts 16:31 — Paul's direct answer to the jailer's question 'What must I do to be saved?' is the foundation for why the jailer believed.
'And brought them out, and said, Sirs, what must I do to be saved? And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house' (Acts 16:30-31 KJV). The Scripture shows the jailer, a pagan Gentile, asking what he must do to be saved, and Paul answering simply that he must believe on the Lord Jesus Christ. The full gospel that Paul preached is stated in 1 Corinthians 15:3-4: 'For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures.'
Les explains that when Paul told the jailer to believe on the Lord Jesus Christ, he was implying the whole message that Paul had been preaching — that Christ died for sins and rose from the dead (Clip 0). The jailer's question came from a heart that God sovereignly prepared, and Paul's answer was not "repent and be baptized," but simply "believe on the Lord Jesus Christ" (Clips 1, 3, 5). Les emphasizes that God had turned to the Gentiles, and this pagan jailer was being addressed under grace, not under the Jewish kingdom program of Acts 2 (Clips 3, 5). The jailer believed the gospel that Paul proclaimed — the death, burial, and resurrection of Christ (Clips 2, 7). He didn't go through any works or rituals; he simply believed, like the deputy in Acts 13:12 (Clip 6).
Les Feldick teaches that "believe on the Lord Jesus Christ" was not an isolated phrase — it carried the weight of Paul's entire gospel message. Since Paul's message was that Christ died for sins and rose from the dead, telling the jailer to believe on the Lord Jesus Christ was telling him to trust what Christ had accomplished on the cross. The jailer understood this because he had evidently heard Paul's full message before being confronted in the prison.
Les points out that in Acts 2, Peter's message to Israel was "repent and be baptized," but that was for the covenant nation of Israel under the kingdom program. In Acts 16, Paul is speaking to a Gentile, and the answer is simply "believe on the Lord Jesus Christ." There is no "repent and be baptized" in Paul's answer because Israel had rejected the kingdom program, and God had now turned to the Gentiles with the gospel of grace.
Although the immediate text records the jailer's outward acts — washing Paul and Silas's stripes, being baptized, setting food before them, and rejoicing — Les's teaching emphasizes that the jailer's trust was placed in the gospel message. His works flowed from his faith; they were not the basis of his salvation. The jailer believed first, and then his changed behavior showed it.
Paul's Message Implied Christ's Death and Resurrection
Les explains that when Paul said "believe on the Lord Jesus Christ," he was implying his whole gospel — that Christ died for sins and rose again.
God Sovereignly Directed the Jailer to Paul and Silas
Les teaches that God let the jailer know that Paul and Silas had the answer to the dilemma that was ultimately about his own soul.
The Simple Response to the Gentile Jailer
Les says the jailer's response was simple: he did nothing except believe on the Lord Jesus Christ — the gospel that Christ died, was buried, and rose again.
Gentile Not Under Israel's Repent-and-Be-Baptized Program
Les contrasts Peter's "repent and be baptized" for Israel with Paul's "believe on the Lord Jesus Christ" for the Gentile jailer.
Why the Gospel Changes After the Cross — Romans 3 Explained
The Lord saved him, by grace, but not on the basis yet that he understood that Christ died for him, because you see in Acts chapter 9, you check me out when you get home, in Acts chapter 9, as soon as Paul has received food, and has gotten his sight back, he's been baptized of course, and now he goes right down to the synagogue. Now when we get into the book of Acts, I'll be pointing all this out.
Israel as a Nation vs. Gentiles as Individuals
Les explains that Peter dealt with Israel as a covenant nation, but Paul deals with every individual who asks, "What must I do to be saved?"
Believing Without Extra Actions
Les cites the Roman deputy who believed simply upon hearing Paul's doctrine, showing that Paul's consistent message led people to faith without unnecessary actions.
Paul's Gospel as the Door
Les stresses that Paul's gospel — Christ died for our sins, was buried, and rose again — is the gospel that opens the door and transforms people.
Acts 16:30-31: And brought them out, and said, Sirs, what must I do to be saved? And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
This is the jailer's direct question to Paul and Silas and Paul's answer that faith in the Lord Jesus Christ brings salvation.
1 Corinthians 15:3-4: For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures.
This is the gospel Paul preached everywhere, which is why telling the jailer to believe on Jesus meant trusting in Christ's death and resurrection.
Acts 16:33-34: And he took them the same hour of the night, and washed their stripes; and was baptized, he and all his, straightway. And when he had brought them into his house, he set meat before them, and rejoiced, believing in God with all his house.
These verses show the jailer's immediate response of caring for Paul and Silas, baptism, and rejoicing in God — all flowing from his faith.
Acts 13:12: Then the deputy, when he saw what was done, believed, being astonished at the doctrine of the Lord.
Les cites this example of a Gentile who simply believed upon hearing Paul's teaching, showing Paul's consistent pattern of salvation through faith.
According to Les Feldick, the jailer believed Paul's gospel — that Christ died for sins and rose again. Les says that same gospel is the criteria for people today, both Gentiles and Jews.
After believing, the jailer washed their stripes, was baptized, brought them into his house, set food before them, and rejoiced. These acts show that his trust in the gospel changed his behavior and produced genuine care for Paul and Silas.
Les Feldick explains that "repent and be baptized" was the Jewish program for Israel, not the answer Paul gave to the Gentile jailer. Paul told him to believe on the Lord Jesus Christ.
Watch the Teaching: What Must I Do to Be Saved? Acts 16 Explained