Then why the need for a Reformation--with numerous new denominations--with a different theology?
And why the prophecy here?
Acts 3:21---King James Version
21 Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began.
That's a restoration, not a Reformation. God's gospel is perfect already, and has no need to be reformed.
Does God add people to His church today--- the same way He did in the NT?
Acts 2:38-42---King James Version
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
42 And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers.
That's the doctrine one will find being practiced in The Church of Jesus Christ of Latter-day Saints.
Some erroneously teach that water baptism is necessary for salvation. But Scripture is clear this is not the case.
In 1 Peter 3:21, the Apostle Peter speaks of two types of baptism: a baptism for salvation and a physical baptism. The baptism for salvation is associated with “an appeal to God for a good conscience – through the resurrection of Jesus Christ.” This baptism is into Christ’s resurrection. This first form of baptism is what happens spiritually when we believe in Jesus. We are spiritually baptized into Christ’s death and resurrection. We see this same sentiment expressed in Romans 6:3-5 and Colossians 2:12.
The second form of baptism referenced by 1 Peter 3:21 (“the removal of dirt from the flesh”) is a physical one. Peter is clear this baptism does
not save! Instead, this baptism is presented as the symbolic representation of what occurred spiritually when we believed in Christ. This is the form of baptism we see Peter address in Acts 10:46-48. The Gentiles had already received the Spirit (without being water baptized), and Peter encourages a physical baptism in light of their salvation.
Additionally, the Apostle Paul did not view baptism as necessary for salvation. He made it clear to the church in Corinth that he came to preach Christ, not baptize people in water (1 Corinthians 1:17). This is quite an odd statement to make if baptism were necessary for salvation.
But what about John 3:5-6 which speaks of the necessity of being born of both water and the Spirit if one wants to enter the kingdom? Here, “born of water” means physical birth. This is seen in verse 6 when John refers to being born of “flesh.” John’s point is that one cannot be only born physically and enter the Kingdom. One must be born physically and be born a second time – spiritually. This was especially important for the Jews to know, since they believed they were God’s people simply based on their birthright (their first birth).
In Acts 2:38, Peter associates repentance and baptism with the forgiveness of sins. Some claim the verse should be read as “repent and be baptized
in order to obtain the forgiveness of sins.” From there, they argue that water baptism causes forgiveness. However, we know from the whole of Scripture (Old and New Testaments) that “without the shedding of blood there is no forgiveness” (Hebrews 9:22). Blood is what brought our forgiveness, not water.
In Acts 2:38, Peter is simply portraying the big picture of salvation. Water baptism was a common public announcement one made to associate themselves with a teaching, movement, or group. In the days of the early church, water baptism and faith in Jesus were closely linked, though they were not inseparable.
In conclusion, Scripture is clear that water baptism doesn’t save anyone. Rather, it is a symbolic act designed to publicly declare we’ve been saved by the death and resurrection of Jesus.