The short answer
Baptism is the act of washing or immersing a person in water as a sign of being cleansed from sin, joined to Jesus Christ, and brought into new life. It is an outward picture of an inward reality. When the apostle Peter's hearers were cut to the heart, his answer was, "Repent and be baptized every one of you in the name of Jesus Christ for the forgiveness of your sins" (Acts 2:38). Baptism is the God-given way of publicly marking the turning point between an old life and a new one.
The word itself simply means to dip or immerse. As one study notes, it comes from the Greek baptisma, which refers to "washing, dipping, or immersing something into water" (Christianity.com). But the physical washing carries layers of meaning: cleansing from sin, dying and rising with Christ, receiving the Holy Spirit, and entering the family of God. This post walks through those layers, looks at how Christian baptism grew out of John's baptism, addresses the question of whether baptism is required for salvation, and then considers what the Divine Principle adds about rebirth and a change of lineage.
What the word actually means
At the most basic level, to baptize is to wash, and washing is the picture at the center of the rite. The prophets long before had promised a coming cleansing: "I will sprinkle clean water on you, and you shall be clean from all your uncleannesses" (Ezekiel 36:25). When Ananias came to the newly converted Saul, his instruction joined the two ideas directly: "Rise and be baptized and wash away your sins, calling on his name" (Acts 22:16). The water does not scrub the soul by itself, but it is the appointed sign that God, through Christ, removes the stain of sin.
Because it is a public act, baptism is also a declaration. A person does not baptize themselves in private; they are baptized before witnesses, confessing faith in front of others. As one summary of the biblical teaching puts it, baptism is "a symbolic way of showing the world that a person has decided to walk with Jesus Christ" and "symbolizes the sinner's entrance into the community of believers" (GotQuestions.org). It is at once deeply personal and unavoidably public — a line crossed openly, not a private sentiment kept to oneself.
Death, burial, and resurrection
The richest explanation of baptism in the New Testament is Paul's, and it goes beyond washing to the imagery of death and resurrection. "Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead... we too might walk in newness of life" (Romans 6:3-4). Going down into the water pictures being buried; coming up again pictures rising to a new life. Baptism dramatizes the believer's whole union with Christ — the old self put to death, a new self raised up.
This is why baptism is so closely tied to being "born again." Jesus told Nicodemus that one must be "born of water and the Spirit" to enter the kingdom of God (John 3:5). The new life is not merely an improved version of the old; it is a genuine new beginning, a second birth. For how that new birth works and what Jesus meant by it, see our fuller treatment of what born again means. Baptism is the outward enactment of that inward new birth — the moment the new life is publicly begun and confessed.
From John's baptism to Christian baptism
Baptism did not begin at Pentecost. John the Baptist was already baptizing crowds in the Jordan, preaching "a baptism of repentance for the forgiveness of sins" (Mark 1:4) and preparing the people for the Messiah who was to come. John himself drew the contrast: "I have baptized you with water, but he will baptize you with the Holy Spirit" (Mark 1:8). His baptism was real and God-given, but it pointed forward; it readied hearts for someone greater. Jesus submitted to John's baptism not because He needed cleansing but "to fulfill all righteousness" (Matthew 3:15), identifying with the people He came to save.
After the resurrection, Jesus gave His followers the commission that defines Christian baptism: "Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:19). This baptism carried more than John's had. In Acts 19, Paul met disciples who had received only John's baptism; when they heard the fuller message, "they were baptized in the name of the Lord Jesus" (Acts 19:5). The progression shows baptism deepening as God's providence advanced — from preparation for the Messiah to full union with the risen Christ. John's pivotal role in that transition is explored in who John the Baptist was.
Is baptism required for salvation?
Sincere Christians answer this differently, and it is worth stating the question carefully. On one side stands the clear command: Jesus told His disciples to baptize, and in Acts baptism follows belief so closely that the two are almost spoken in one breath. No one who takes Scripture seriously treats baptism as optional or unimportant. On the other side stands the equally clear witness that salvation rests on Christ received by faith, not on a ritual performed. The thief crucified beside Jesus was promised, "today you will be with me in paradise" (Luke 23:43), without ever being baptized.
The most common way to hold these together is to say that baptism is the normal, commanded, outward expression of saving faith — the sign God has appointed — without making the water itself the thing that saves. Faith lays hold of Christ; baptism declares and seals that faith publicly. The danger to avoid on both sides is real: treating baptism as a magic act that works regardless of the heart, or treating it as a dispensable extra that can be indefinitely postponed. Scripture honours it as the God-given doorway into the visible life of faith, which is why the New Testament never pictures a believer who simply declines to be baptized.
The Divine Principle view: rebirth and a new lineage
The Divine Principle takes the biblical language of new birth with full seriousness and asks what, exactly, must be reborn. Its answer draws out a theme already present in Scripture: humanity inherited a fallen nature and, in a real sense, a fallen lineage — a line of descent marked from the beginning by separation from God. Baptism and the new birth therefore point beyond personal forgiveness to the deeper need for a change of lineage: to be grafted out of the line of the fall and into a line rooted in God. Paul uses exactly this picture when he speaks of being "grafted in" to a new root (Romans 11:17-24).
Seen this way, baptism is the outward sign of an inward reality that is larger than an individual decision. It marks the beginning of a life being restored to its original relationship with God — not merely a slate wiped clean but a person being brought into a new family and a new line. This is why the Divine Principle places such weight on why lineage is central to salvation and on why we inherit Adam's sin. The water of baptism pictures the washing away of the old; the fuller work it anticipates is the reversal of the fall itself, so that a person no longer lives out of the inheritance of sin but out of a restored heritage in God. Understood against that backdrop, baptism is not a small ceremony but a sign pointing at the whole hope of restoration.
Frequently asked questions
What is the meaning of baptism in the Bible?
Baptism is the act of washing or immersing a person in water as a sign of cleansing from sin, union with Jesus Christ, and entry into new life. The Greek word baptizo means to dip or immerse. Scripture presents it as an outward sign of an inward reality: the believer is washed clean (Acts 22:16), joined to Christ's death and resurrection (Romans 6:3-4), and marked as belonging to God's people. It is both a public declaration of faith and a picture of being made new.
Why do Christians get baptized?
Christians get baptized in obedience to Jesus, who commanded His followers to baptize disciples "in the name of the Father and of the Son and of the Holy Spirit" (Matthew 28:19). Baptism publicly identifies a person with Christ, symbolizes cleansing from sin and the start of a new life, and marks entry into the community of believers. In the book of Acts the apostles repeatedly called people to "repent and be baptized" as the natural response to believing the gospel (Acts 2:38).
Does baptism wash away sin?
Baptism is the appointed sign of the washing away of sin, but Scripture locates the actual cleansing in Christ and received through faith and repentance, not in the water itself. Ananias told Saul to "be baptized and wash away your sins, calling on his name" (Acts 22:16) — the washing and the calling on Jesus belong together. Most Christian traditions understand baptism as the outward expression of an inward cleansing that God works through faith in Christ's finished work.
Is baptism required for salvation?
Christians differ on this. Many hold that baptism is the commanded and normal expression of saving faith but is not the ground of salvation — pointing to the thief on the cross, who was promised paradise without being baptized (Luke 23:43), and to Paul's emphasis on faith. Others treat baptism as the moment salvation is normally applied. Across traditions there is wide agreement that baptism should never be treated as optional or dismissed, since Jesus explicitly commanded it.
What is the difference between John's baptism and Christian baptism?
John the Baptist's baptism was "a baptism of repentance for the forgiveness of sins" that prepared people for the coming Messiah (Mark 1:4). Christian baptism, commanded after Jesus' resurrection, adds union with Christ's death and resurrection and the gift of the Holy Spirit. In Acts 19:1-5, disciples who had received only John's baptism were baptized again "in the name of the Lord Jesus," showing that Christian baptism pointed to something John's baptism had only anticipated.