Jesus says: “Whoever believes and is baptized will be saved, but whoever does not believe will be condemned” (Mark 16:16).
Luther explains: “What benefits does baptism give? It works forgiveness of sins, rescues from death and the devil, and gives eternal salvation to all who believe this, as the words and promises of God declare.”
Salvageable adds: That triple blessing of forgiveness, rescue, and eternal life were won by Jesus on the cross. He shares those gifts with all who believe in him. Baptism is a means of grace because it conveys those gifts to each individual Christian. God’s promise is made personal through the Sacrament of Holy Baptism.
Baptism is also an adoption ceremony. No one is a child of God through being created by God. All of us have strayed like wandering sheep, forsaking the God who made us. None of us deserve to call him Father. Jesus claims us for his Kingdom and makes God our Father by his sacrifice on the cross. The crucifixion of Jesus pays the full price for our adoption. Holy Baptism is the ceremony that applies that payment personally to each Christian. Even Jesus was baptized. He did not need to be baptized. He is the true Son of God and does not require an adoption. He is sinless and needs no forgiveness. He overcame death and the devil and already possess eternal life. Yet Jesus was baptized to (in his words) “fulfill all righteousness.” His baptism grants power to our baptisms. Through the adoption conducted by Holy Baptism, the Father of Jesus Christ sees each of us as his Son. He says to each of us what he said to Jesus: “You are my Son. You are the one I love. With you I am well pleased.”
Mark 16:16 clearly says that whoever believes and is baptized will be saved. It also clearly says that whoever does not believe will be condemned. Whoever has been baptized but does not believe remains condemned. Baptism did not fail that person, but that person failed to remain in the faith given by God.
The verse does not address the question about someone who believes but is not baptized. God does not want us to live in doubt. He prefers that whoever comes to faith should be baptized as soon as possible to remove any doubt about God’s promise. Likewise, Christian parents arrange for their children to be baptized at the first opportunity. Trusting the promise of God and the power of his Word, they seek his guarantee, just as Peter said on Pentecost: “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. For the promise is for you and for your children…” (Acts 2:38-39). J.