Baptism is not just plain water, but it is the water included in God’s command and combined with God’s word.
Which is that word of God?
Christ our Lord says in the last chapter of Matthew: “Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit.” (Matt. 28:19)
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.
Which are these words and promises of God?
Christ our Lord says in the last chapter of Mark: “Whoever believes and is baptized will be saved, but
whoever does not believe will be condemned.” (Mark 16:16)
It indicates that the Old Adam in us should by daily contrition and repentance be drowned and die with all sins and evil desires, and that a new man should daily emerge and arise to live before God in righteousness and purity forever.
Where is this written?
St. Paul writes in Romans chapter six: “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.” (Rom. 6:4)