Here’s the link to Article IX: https://bookofconcord.org/augsburg-confession/of-baptism/
“Baptism is necessary to salvation.” For many Protestants, this article will sound strange and contradictory — even offensive. After all, isn’t the core doctrine of the reformation justification by grace alone through faith alone? Isn’t baptism a work, and aren’t we justified by faith apart from works?
Before answering these questions, let us consider some of the key Biblical texts that teach about baptism:
Matthew 28:19-20: “19 Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age.” (ESV)
- Here, Jesus gives the command to make disciples, and then explains the two essential ingredients of discipleship: baptism and teaching. These two go hand in hand.
John 3:5: “Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.” (ESV)
- Not all interpreters agree on the meaning of Jesus’ words, but historically, this has been understood to refer to baptism.
Acts 2:37-39: “37 Now when they heard this they were cut to the heart, and said to Peter and the rest of the apostles, “Brothers, what shall we do?” 38 And Peter said to them, “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. 39 For the promise is for you and for your children and for all who are far off, everyone whom the Lord our God calls to himself.””
Acts 22:16: “And now why do you wait? Rise and be baptized and wash away your sins, calling on his name.'” (ESV)
- In these verses, Baptism is described as washing sins away and it is attached to the promise of the Holy Spirit.
Titus 3:4-7: “4 But when the goodness and loving kindness of God our Savior appeared, 5 he saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit, 6 whom he poured out on us richly through Jesus Christ our Savior, 7 so that being justified by his grace we might become heirs according to the hope of eternal life.” (ESV)
- Like John 3:5, there is debate over the meaning of this text. However, it seems most likely that the “washing of regeneration” is a reference to baptism.
1 Peter 3:21: “Baptism, which corresponds to this, now saves you, not as a removal of dirt from the body but as an appeal to God for a good conscience, through the resurrection of Jesus Christ.” (ESV)
- Peter states that baptism saves you. He goes on to clarify that it is not the water itself that does so: rather, it is the “appeal to God for a good conscience.” There are a number of grammatical and linguistic difficulties with this phrase. If you don’t know Greek, it is well worth looking at a variety of different translations. However, I would suggest that if baptism saves, then it must be God’s work, not mine.
Romans 6:3-5: “3Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? 4 We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. 5 For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his. (ESV)
- Here, baptism is described as union with Christ. Baptism unites us to Christ in his death and resurrection.
Returning to the original question: rather than being a work for us to do, baptism is a gift that God delivers through human agents. Baptism derives its efficacy from the Word of God, and it saves in the same way that preaching saves: through baptism, the Holy Spirit imparts faith.
At this point, I will add three further observations:
1) When Lutherans confess that baptism is necessary to salvation, they mean that it is the ordinary means by which God delivers the forgiveness that Christ won on our behalf. Lutheran theologians often point out that we are bound to the means of grace, but God is not. Therefore, they also state that baptism is necessary but not absolutely necessary to salvation.
For example, someone might hear the gospel, believe it, and desire to be baptized, but die before they have the chance. We believe that such a person is saved. Likewise, the thief on the cross and all the Old Testament saints were saved without baptism. Nonetheless, to deliberately reject baptism is a perilous thing indeed.
2) Not every baptized person will be saved. Faith in Christ is absolutely necessary. Indeed, the scripture is clear that those who do not believe in Christ will be condemned (e.g. John 3:18; Mark 16:16). A person could go through the motions of being baptized for hypocritical reasons. Likewise, a person could be a genuine believer and get baptized, but later abandon the faith.
3) We baptize infants because they need the gift as much as anyone. They are sinners in need of forgiveness (see Article II)! Furthermore, infants are capable of faith (Psalm 22:9) and Jesus holds them up as the example for all of us (Matthew 18:3). How, then, could we withhold this gift from them?