The biblical basis for immersion
The Greek word for baptism — baptizō — means to dip, immerse, or plunge into a liquid. Proponents of immersion argue that the word itself implies the mode: baptism is full submersion, not sprinkling or pouring.
The baptism of Jesus in the Jordan River (Matthew 3:13–17) provides the clearest narrative picture: Jesus "went up from the water" (Mark 1:10) — language that implies he had been in it. John the Baptist chose the Jordan because "there was much water there" (John 3:23) — an odd consideration if sprinkling were the mode.
Paul's theological description of baptism in Romans 6:3–4 also supports the immersion interpretation: "We were buried with him by baptism into death, in order that... we too might walk in newness of life." The imagery of burial and resurrection — going under and coming back up — maps naturally onto immersion.
Credobaptism vs. paedobaptism
The question of baptism mode (how to baptize) is closely related to but distinct from the question of baptism subjects (who should be baptized):
- Credobaptism (from Latin credo, "I believe") — the position that only those who have made a personal, conscious profession of faith in Jesus Christ should be baptized. This is the position of Baptists, most non-denominational churches, Pentecostals, Churches of Christ, and many free evangelical traditions. Credobaptists practice immersion almost universally.
- Paedobaptism (from Greek pais, "child") — the position that baptism is the New Covenant sign applied to the children of believers, analogous to circumcision in the Old Covenant. This is the position of Catholics, Lutherans, Presbyterians, Methodists, and Anglicans. Paedobaptists typically use sprinkling or pouring rather than immersion, though some practice immersion of infants.
These are not just ritual differences — they reflect significantly different understandings of the nature of the covenant, the church, and what baptism signifies and does.
What baptism by immersion signifies
In Baptist and evangelical theology, baptism by immersion pictures the three defining events of the Christian message:
- Death. Going under the water represents the believer's co-death with Christ — dying to the old self, the old life, and the power of sin.
- Burial. Full immersion physically enacts what Paul describes in Romans 6 — being "buried with him."
- Resurrection. Coming up out of the water represents resurrection to new life — the new creation that the believer is in Christ (2 Corinthians 5:17).
In this view, baptism is an ordinance — an outward act that declares and pictures something real that has already happened inwardly. It does not save; it publicly confesses the salvation that has already occurred through faith. This is the key difference from Catholic and Lutheran sacramental theology, which holds that baptism is a means of grace that actually conveys what it signifies.
What happens at a baptism service
In most Baptist and evangelical churches, baptisms are celebrated during a regular Sunday service or a special service, typically in a baptismal pool (baptistry) built into the front of the sanctuary:
- The candidate shares a brief testimony of their faith — when and how they came to trust Christ
- The pastor or elder places one hand behind the candidate's back and holds their wrist with the other hand
- The pastor declares a formula: typically "I baptize you in the name of the Father, the Son, and the Holy Spirit, in obedience to the command of our Lord Jesus Christ"
- The candidate is lowered beneath the water and raised up again
- The congregation typically applauds and celebrates
Some churches baptize in rivers, lakes, or the ocean — particularly for outdoor services or when the baptism is connected to a camp, retreat, or outdoor ministry event. Outdoor baptism in living water has ancient roots and is considered especially meaningful by many.
Believer's baptism and church membership
In Baptist and many non-denominational churches, believer's baptism is closely connected to church membership. Baptism is understood as the public marker of entry into the covenant community — the visible church. Most Baptist churches require baptism by immersion as a condition of formal membership, even for people who were baptized as infants in another tradition.
This means that a person who was baptized as an infant in a Catholic, Lutheran, or Presbyterian church and later joins a Baptist church will typically be asked to be baptized again — not because their previous church experience was invalid, but because, in the Baptist view, infant baptism is not baptism in the New Testament sense (it precedes personal faith rather than following it).
Frequently asked questions
Is baptism necessary for salvation?
This depends entirely on the theological tradition. Baptist and most evangelical churches teach that baptism is not required for salvation — it is an act of obedience that follows salvation, not a means of receiving it. The thief on the cross (Luke 23:43) was saved without baptism. Churches of Christ and some other traditions do teach baptismal regeneration — that baptism is the moment of salvation. Catholic and Lutheran theology teaches that baptism ordinarily conveys saving grace. The question of baptism's necessity for salvation remains one of the live theological debates in Christianity.
What if someone was already baptized as an infant?
In Baptist and many non-denominational churches, the answer is that infant baptism is not considered valid baptism — it preceded personal faith and therefore did not fulfill the New Testament pattern. People coming from infant-baptism traditions who join a Baptist or evangelical church are typically encouraged to be baptized as a believer. This "rebaptism" can feel disrespectful of one's church history, and many people struggle with the decision. A good pastor will walk through the theological questions without pressure.