The New Testament teaches that baptism is essential to salvation.
Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit."
— Acts 2:38
New Testament baptism is for the sinner who turns to the Lord in belief and repentance — therefore, "infant" baptism is not of the New Testament. An infant has no sin of which to repent and cannot be a believer.
Those who accepted his message were baptized — Acts 2:41a
Baptism in the New Testament has specific purposes:
♦ To enter the kingdom
Jesus answered, "I tell you the truth, no one can enter the kingdom of God unless he is born of water and the Spirit. — John 3:5
♦ To contact the blood of Christ
Or don't you know that all of us who were baptized into Christ Jesus were baptized into his death? We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life. — Romans 6:3-4
♦ To be in Christ
For all of you who were baptized into Christ have clothed yourselves with Christ. — Galatians 3:27
♦ To gain salvation
Whoever believes and is baptized will be saved, but whoever does not believe will be condemned. — Mark 16:16
… this water symbolizes baptism that now saves you also – not the removal of dirt from the body but the pledge of a good conscience toward God. It saves you by the resurrection of Jesus Christ — I Peter 3:21
♦ To gain remission of sins
Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit." — Acts 2:38
♦ To wash away sins
And now what are you waiting for? Get up, be baptized and wash your sins away, calling on his name. — Acts 22:16
♦ To be in the chuch
For we were all baptized by one Spirit into one body – whether Jews or Greeks, slave or free – and we were all given the one Spirit to drink. — I Corinthians 12:13
I pray also that the eyes of your heart may be enlightened in order that you may know the hope to which he has called you, the riches of his glorious inheritance in the saints, and his incomparably great power for us who believe.
That power is like the working of his mighty strength, which he exerted in Christ when he raised him from the dead and seated him at his right hand in the heavenly realms, far above all rule and authority, power and dominion, and every title that can be given, not only in the present age but also in the one to come. And God placed all things under his feet and appointed him to be head over everything for the church, which is his body, the fullness of him who fills everything in every way.
— Ephesians 1:18-23