He that believeth and is baptized shall be saved (Mark 16:16a). 

Baptism

Baptism is an act of obedience to Jesus Christ who commanded it.  It is also a public testimony of you accepting Jesus Christ as your Savior.   Baptism is a symbol of your total identification with Christ in His death, burial, and resurrection.  Going under the water shows you believe Jesus died on the cross for your sins and was buried.  Coming up out of the water shows you believe He was raised from the dead.  Baptism also shows you have died to your old way of life and are raised to a new life with Jesus as your Savior and Lord of your life.

Baptism is like a wedding ring. It lets others know we love and belong to Jesus Christ. Therefore, a person who has received Jesus Christ as Savior and Lord and truly loves Him will not hesitate to publicly identify with Jesus through baptism.

Scriptures on Baptism