Why is baptism significant in relation to the body of sin?

Baptism serves as an outward expression of the inward reality of a believer's union with Christ. In Romans 6:3-4, Paul demonstrates that baptism represents our being buried with Christ in His death and raised to walk in newness of life. This act symbolizes the destruction of the body of sin as it points to the believer’s identification with Christ’s work. Thus, through baptism, believers publicly affirm their faith in the transformative power of Christ's death and resurrection, and the resultant freedom from the dominion of sin.