Baptism

Peter said to them," Repent, and be baptized every one of you in the name of Jesus Christ so that your sins may be forgiven; and you will receive the gift of the Holy Spirit."
Acts 2:38 (NRSV)

From the Preamble to The Design of the Christian Church (Disciples of Christ), rev. 2005
"Through baptism into Christ, we enter into newness of life and are made one with the whole people of God."

Just as the baptism represents the death, burial and resurrection of Jesus Christ, it symbolizes the death and burial of the old self of the repentant believer, and the joyous birth of a brand new being in Christ. Those who founded the Disciples movement taught baptism by immersion as the accepted form.