The church exists to bring people into the Body of Christ. The church exists to bring people into a relationship, or fellowship with God through Jesus Christ and into fellowship with the rest of the Body. Baptism is, among other meanings, an initiation rite for those who wish to become part of the fellowship of the church. As Christians we are called as much to belong as to believe. We are to belong to Christ's family, the church, and be members of his body.
Baptism is as much a symbol of fellowship as it is a symbol of salvation.
Baptism not only symbolizes our new life in Christ, but also demonstrates visually a person's incorporation into the body of Christ. It is the purpose of the church to educate God's people. The church exists not only to reach people but to teach them. It is the church's responsibility to develop people to spiritual maturity.