what does the bible say?
Baptism is a one-time public declaration of faith in Jesus Christ and is not meant to be repeated when a believer sins. Jesus established baptism as a profession of faith rather than a continual cleansing from sin (Matthew 28:19—20). Early believers who came to faith were baptized once, as seen when 3,000 people were baptized on the day of Pentecost (Acts 2:41). Baptism symbolizes being united with Christ in His death and resurrection, walking in newness of life (Romans 6:3-4), but it does not remove sins committed after that moment.
Even if a believer sins, the proper response is confession and repentance, trusting God to forgive and cleanse (1 John 1:9). The story of the thief on the cross shows that salvation comes through faith, not baptism (Luke 23:43). Therefore, baptism should be understood as a one-time act of obedience and public commitment, while ongoing sin is addressed through faith, confession, and living according to God’s Word.