The Forgiveness of Sins
The Nicene Creed says One baptism for the remission of sins.
All forgiveness is through faith. Through Word and Sacrament you receive the forgiveness of sins.
Mark 1:4 John came baptizing in the wilderness and preaching a baptism of repentance for the remission of sins.
Luke 3:3 And he went into all the region around the Jordan, preaching a baptism of repentance for the remission of sins,
Luke 24:46-47 Then He said to them, "Thus it is written, and thus it was necessary for the Christ to suffer and to rise from the dead the third day, and that repentance and remission of sins should be preached in His name to all nations, beginning at Jerusalem.
Acts 2:38 Then Peter said to them, "Repent, and let every one of you be baptized in the name of Jesus Christ for the remission of sins; and you shall receive the gift of the Holy Spirit.
Acts 10:43 "To Him all the prophets witness that, through His name, whoever believes in Him will receive remission of sins."
John 20:21-23 So Jesus said to them again, "Peace to you! As the Father has sent Me, I also send you." And when He had said this, He breathed on them, and said to them, "Receive the Holy Spirit. "If you forgive the sins of any, they are forgiven them; if you retain the sins of any, they are retained."
Matthew 26:27-28 Then He took the cup, and gave thanks, and gave it to them, saying, "Drink from it, all of you. For this is My blood of the new covenant, which is shed for many for the remission of sins.
Remission of sins is given to you through the preaching of the Gospel, baptism, the Lord's Supper, and absolution.
Baptism is not some bare symbol. Baptism really does what God tells you it does because of what the Lamb did.
1 Peter 3:21 There is also an antitype which now saves us -- baptism (not the removal of the filth of the flesh, but the answer of a good conscience toward God), through the resurrection of Jesus Christ,
Acts 22:16 'And now why are you waiting? Arise and be baptized, and wash away your sins, calling on the name of the Lord.'
The Lamb is not trying to trick you. The Lamb is not telling you that water baptism is all fine and dandy but doesn't really do anything. The Lamb is not separating water baptism from some sort of mystical spirit baptism. The Lamb is Faithful and True. Baptism is not something you do. Baptism is something God does to you. The Bible does not speak of anyone baptizing himself. You are baptized. You are forgiven. You are adopted. Your sins are forgiven. Faith is not something you do. Faith is a gift of God (Eph. 2:8). God can give faith to an embryo. It is His gift. God promises to give faith in baptism. Faith is not based on your cognitive ability. Faith is based on the work of the Lamb.