We have seen what baptism is — immersion, burial, emergence, the response of a believing heart to a clear command. But what is it for? What does it actually accomplish? What happens at the moment a believer is buried in the water and raised up out of it?
The answer is not left to speculation. The apostles — the men Christ personally trained and sent — spoke with remarkable consistency on this question. From Pentecost forward, in letters to churches across the Roman world, they described baptism in specific terms. They did not describe it as a symbol of something already accomplished. They described it as the very moment at which God does something.
Let us take their teaching effect by effect.
For the Forgiveness of Sins
This is where the apostolic teaching begins. In the very first gospel sermon ever preached after the resurrection, Peter stood before the crowd at Pentecost and said:
“Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit.”
— Acts 2:38
“For the forgiveness of your sins.” Not because their sins had already been forgiven. Not as an outward sign that forgiveness had happened somewhere else. For the forgiveness of sins. That is what the word says.
And years later, when Ananias came to Saul of Tarsus — a man who had already seen the risen Lord, who had already believed, who had already fasted and prayed for three days — Ananias did not tell him his sins were already gone. He said:
“Now why do you delay? Get up and be baptized, and wash away your sins, calling on His name.”
— Acts 22:16
Wash away your sins. Saul’s sins were still there after the vision. Still there after three days of prayer. They were washed away when he was baptized. Peter and Ananias — two apostolic voices in two different cities speaking to two different audiences — gave the same answer. Baptism is where sins are washed away.
To Unite Us with the Death and Resurrection of Christ
Paul, writing to Christians in Rome, opened a door into the meaning of baptism that no other passage opens quite so plainly:
“Or do you not know that all of us who have been baptized into Christ Jesus have been baptized into His death? Therefore we have been buried with Him through baptism into death, so that as Christ was raised from the dead through the glory of the Father, so we too might walk in newness of life.”
— Romans 6:3–4
Baptized into His death. Buried with Him. Raised with Him. This is not a symbol of what Christ did for us — this is our union with what Christ did. The death He died, we die with Him in baptism. The resurrection He experienced, we share with Him as we come up out of the water. The old life is buried. The new life begins.
Paul wrote the same thing to the Colossians:
“Having been buried with Him in baptism, in which you were also raised up with Him through faith in the working of God, who raised Him from the dead.”
— Colossians 2:12
Buried with Him. Raised with Him. Through faith. This is why baptism by immersion matters — because the picture only works as a burial and a resurrection. You do not bury someone by sprinkling a handful of dust. And you do not share in Christ’s death and resurrection by symbolically representing something that already happened without you.
To Clothe Us with Christ
Paul also wrote to the Galatians:
“For all of you who were baptized into Christ have clothed yourselves with Christ.”
— Galatians 3:27
Before baptism, a person is clothed in his own sin — his own record, his own failures, his own standing before God. In baptism, that clothing is replaced. He puts on Christ. Christ’s righteousness becomes his covering. Christ’s identity becomes his. This is not something the believer does for himself. It is what happens to the one who is baptized into Christ.
To Place Us Into Christ — Where Every Spiritual Blessing Resides
This may be the single most compelling structural argument in the entire New Testament for the necessity of baptism. Follow the logic carefully.
Paul opens his letter to the Ephesians with this declaration:
“Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ.”
— Ephesians 1:3
Every spiritual blessing. Every single one. Forgiveness of sins. Adoption as sons. The sealing of the Holy Spirit. Redemption. Reconciliation. The hope of eternal life. All of it — Paul says — is “in Christ.” Not beside Christ. Not available to those near Christ. In Christ. If a person is not in Christ, he has none of these things. If a person is in Christ, he has all of them.
Now ask the next question: how does a person get into Christ?
The New Testament answers this question in exactly two places. Both are Paul. Both say the same thing.
“Or do you not know that all of us who have been baptized into Christ Jesus have been baptized into His death?”
— Romans 6:3
“For all of you who were baptized into Christ have clothed yourselves with Christ.”
— Galatians 3:27
That is it. Those are the only two passages in all of Scripture that tell us how a person comes to be “into Christ.” And both say baptism.
The logic is inescapable. If every spiritual blessing is in Christ, and the only way the New Testament describes for a person to get into Christ is baptism, then a person who refuses baptism remains outside of where every spiritual blessing is found. This is not a harsh conclusion imposed on the text. It is the text’s own conclusion, drawn from its own sentences. There is no third passage telling us how to get into Christ some other way. There is no escape clause. Paul said what he said, and he said it twice, in letters to two different churches, using the same vocabulary.
Anyone who wishes to argue that a person can be “in Christ” without baptism must produce the Scripture that says so. It does not exist.
To Place Us Into the One Body
What is true of the individual is true of the community. Paul wrote to the Corinthians:
“For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or free, and we were all made to drink of one Spirit.”
— 1 Corinthians 12:13
Baptism is how we enter the body. Not a denominational body — the body, the one body of Christ, the church that Jesus said He would build (Matthew 16:18; Ephesians 1:22–23). The distinctions that divided the ancient world — Jew and Greek, slave and free — were erased at this point of entry. One act brought every believer into one body. And every member of that body had been baptized into it.
To Regenerate Us — the Washing of Regeneration
Paul wrote to Titus:
“He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy, by the washing of regeneration and renewing by the Holy Spirit.”
— Titus 3:5
The washing of regeneration. Regeneration is the new birth — being made new, being born again. And Paul names baptism — the washing — as the means by which that regeneration takes place. This is precisely what Jesus told Nicodemus in John 3:5: “unless one is born of water and the Spirit he cannot enter into the kingdom of God.” What Jesus stated in general terms, Paul states in specific ones. The water is baptism. The new birth happens there. (We will return to this verse in Chapter 10, where it also settles decisively the question of whether baptism conflicts with grace — it does not.)
To Save Us
And Peter — the same apostle who said “for the forgiveness of your sins” on the day of Pentecost — wrote decades later:
“Corresponding to that, baptism now saves you — not the removal of dirt from the flesh, but an appeal to God for a good conscience — through the resurrection of Jesus Christ.”
— 1 Peter 3:21
“Baptism now saves you.” The language could not be plainer. And Peter even anticipated the objection — he paused to clarify that he was not talking about physical washing. He was talking about the appeal to God, the response of faith, that takes place in the act. And that appeal, he said, saves you.
This is the same thing Christ Himself had said before He ascended: “He who has believed and has been baptized shall be saved” (Mark 16:16). Peter was not inventing a doctrine. He was preaching what the Lord had already commanded.
One Lord, One Faith, One Baptism
Paul summed up the matter to the Ephesians:
“One Lord, one faith, one baptism.”
— Ephesians 4:5
One baptism — placed side by side with the one Lord we confess and the one faith we hold. Not optional. Not ceremonial. Not secondary. Alongside the Lord Himself and the faith we profess, there stands one baptism — the doorway through which every believer passes into Christ.
The Unanimous Witness
Look at what we have heard. Peter at Pentecost — for the forgiveness of sins. Peter decades later in his epistle — baptism now saves you. Paul to the Romans — buried with Christ, raised with Christ, walking in newness of life. Paul to the Corinthians — baptized into the one body. Paul to the Galatians — clothed with Christ. Paul to the Ephesians — one Lord, one faith, one baptism. Paul to the Colossians — buried and raised through baptism. Paul to Titus — the washing of regeneration. Ananias to Saul — arise and wash away your sins.
Every apostolic voice we possess. Every letter. Every sermon. The same message. Not one of them called baptism optional. Not one of them called it a mere symbol. Not one of them suggested an alternative means of entering Christ, receiving forgiveness, or being saved. They spoke with one voice because they had been taught by one Lord, and that Lord had commanded baptism to be preached to every nation.
A Word on 1 Corinthians 1:17
Some have pointed to a single sentence from Paul — “Christ did not send me to baptize, but to preach the gospel” (1 Corinthians 1:17) — as though Paul himself considered baptism unimportant. Read in context, the verse says precisely the opposite of what is claimed.
The Corinthians had fallen into factionalism. Some were saying “I am of Paul,” others “I am of Apollos,” others “I am of Cephas,” and still others “I am of Christ” (1 Corinthians 1:12). Paul was scandalized. His response was sharp: “Has Christ been divided? Paul was not crucified for you, was he? Or were you baptized in the name of Paul?” (v. 13). The appeal to baptism here is not to minimize it — it is to show the absurdity of factions. Those who were baptized in the name of Christ belong to Christ, not to the preacher who happened to baptize them.
It is in this context that Paul expressed gratitude that he had personally baptized few of them — Crispus, Gaius, the household of Stephanas (vv. 14–16) — “so that no one would say you were baptized in my name” (v. 15). His point was not that baptism did not matter; his point was that he was glad he had not unwittingly contributed to the factions.
“Christ did not send me to baptize, but to preach the gospel” expresses the division of apostolic labor, not the dispensability of baptism. Paul’s primary commission was evangelism — founding churches, planting the gospel in new territory. The actual administering of baptism was typically carried out by others, as in Cornelius’ case, when Peter “ordered them to be baptized” without doing so personally (Acts 10:48). Had baptism been unnecessary, Paul would have said so plainly. Instead, he assumed it throughout — the Corinthians had been baptized; it was baptism that united them to Christ; it was baptism that should have prevented their factions.
The very same Paul who wrote 1 Corinthians 1:17 also wrote Romans 6, Galatians 3:27, Colossians 2:12, Ephesians 4:5, and Titus 3:5. To read 1 Corinthians 1:17 as a denial of baptism’s necessity is to set Paul against himself.