What is the context?
Peter connects the water in Noah’s story with baptism through a word meaning a corresponding picture. The comparison belongs to his movement from judgment and rescue to the believer’s relationship with the risen Christ.
He says that baptism now saves, then distinguishes it from removing dirt from the body. The BSB calls it the pledge of a clear conscience toward God. The Greek expression is also read as an appeal or request to God for a good conscience; its precise sense is discussed by interpreters.
The saving connection is through Jesus Christ’s resurrection. Peter closes with Christ in heaven at God’s right hand, with angels, authorities and powers subject to Him. The One in whom believers place their hope is risen and rules.
How is this passage commonly understood?
Christians differ over how baptism conveys or expresses God’s saving gift. The Catholic Catechism, 1213, teaches that baptism frees from sin, gives new birth and incorporates a person into Christ. The Lutheran Small Catechism, Baptism, teaches forgiveness and salvation through God’s word joined with water, received in faith.
The Reformed Westminster Confession, 28.1, 28.5–6, calls baptism a sign and seal of grace, while denying that everyone baptized is necessarily born anew or that salvation is impossible without baptism. The 1689 Baptist Confession, 29.1–2, describes it as a sign of union with Christ in death and resurrection, given to those who profess repentance and faith.
Wesley distinguishes the outward sign from inward grace. These readings do not all make baptism work in the same way, but none of these documents assigns saving power to ordinary water acting apart from God.
Where does this fit in God's plan?
Romans 6:3–5 connects baptism with Christ’s death and resurrection and the call to walk in new life. Peter likewise directs attention through the outward act to the risen Christ and the life received through Him.
Ephesians 1:20–23 joins Christ’s resurrection and place at God’s right hand with His authority over every power for the church. The final word here is the authority of the Savior to whom believers belong.
What is our position?
Our study Baptism understands baptism here as the appointed expression of genuine faith, in which that faith is formally pledged before God. The water has no saving power of its own. The saving power belongs to Christ and His resurrection, received through faith.