Having faith/believing in Jesus Christ is proven by one's obedience to His word.
Proven or demonstrated yes, but not established. We are saved by faith/believing in Jesus Christ at it's origin and not at some time later, after we accomplish multiple acts of obedience/works.
And in regards to the NT spiritual rebirth man's obligation is to repent, and be water baptized in the name of Jesus Christ for the remission of sin.
The new birth precedes water baptism and is signified, but not procured in the waters of baptism.
God provides the gift of the infilling of the Holy Spirit as He wills to those willing to believe and obey the gospel message.
Believe AND obey the gospel? We obey the gospel by choosing to believe the gospel. *Romans 10:16 - But they have not all
obeyed the gospel. For Isaiah says, “Lord, who has
believed our report?” You turn "obey" the gospel into "salvation by works" after we believe the gospel.
The sequence has no bearing on the result. However, all components of the rebirth are required as confirmed by the detailed records in the biblical record.
According to your eisegesis, but not actually.
What you shared about apostles Peter and John needing to lay hands on those in Acts 8:16-17 because of the animosity between Jews and Samaritans is not accurate.
Sure it is and it makes perfect sense.
As an apostle himself, Philip could have "remedied the problem" through the laying on of hands. Clearly God used the experience to clarify the point that people do not instantly receive the Holy Ghost upon believing the message, and confirmed it with the Acts 19 account. This truth is consistent with the 2-3 witnesses required to establish biblical truth.
More eisegesis. In the account in Acts 19, they had not so much as heard whether there is a Holy Spirit and were not yet believers, which explains why they have not received the Holy Spirit. They did not realize that Jesus Christ was the One to whom John's baptism pointed and still needed a gospel presentation from Paul. The laying on of hands in order for them to receive the Holy Spirit (just as in Acts 8) was the exception and not the rule for everyone. People do receive the Holy Spirit upon believing the gospel message (John 3:37-39; Acts 10:43-47; 11:17; 15:7-9; Ephesians 1:13). Every Christian that I know (including myself) has received the Holy Spirit the very moment we believed the gospel.
Acts 10:43 states plainly that it is through Jesus' name that those who believe in Him shall receive remission of sins. What command was associated with the name of the Lord Jesus? The answer. Peter commanded the group to be baptized in water in the name of the Lord Jesus. The group obeyed the command just as the Jews did at Pentecost. (Acts 2:36-42) And as stated by the Jewish Counsel, they too, received repentance until life having their sins remitted in association with Jesus' sacrifice.
Acts 10:43 - Of Him all the prophets bear witness that through His name everyone who
believes in Him "apart from a additions or modifications"
receives forgiveness of sins. Water baptism
"followed" believing in Him and receiving the Holy Spirit and salvation. (Acts 10:43-48) So once again, the only logical conclusion
when properly harmonizing Scripture with Scripture is that faith in Jesus Christ "implied in genuine repentance" (rather than water baptism) brings the remission of sins and the gift of the Holy Spirit (Luke 24:47; Acts 2:38; 3:19; 5:31; 10:43-47; 11:17,18; 15:8,9; 16:31; 26:18). *Perfect Harmony*
Pay close attention to Peter's comment in Acts 11:17-18. It was after the Gentiles were filled with the Holy Ghost that he pointed out that not administering water baptize to the group would be to withstand God. As such the group believed and obeyed Peter's command thus fulfilling their obligation along with being filled with the Holy Ghost that granted them repentance until life.
The evidence is overwhelming that these Gentles
believed, received the gift of the Holy Spirit, spoke in tongues, magnified God, and were saved and a part of the body of Christ before they were water baptized. Certain Jews may have wanted to forbid them from being baptized because of their unacceptance of the Gentiles, but Peter clearly states that
SURELY NO ONE CAN REFUSE. (Acts 10:47) These Gentiles were clearly
SAVED BEFORE WATER BAPTISM and the Holy Spirit was proof of this.
Romans 8:9 - But you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you.
Now if anyone does not have the Spirit of Christ, he is not His. If one has received the Holy Spirit they "belong" to Christ. To belong to Christ does not describe the condition of a lost unbeliever but a saved believer - such was the case of these Gentiles
before they were water baptized.
1 John 4:13 - By this we know that we abide in Him, and He in us, because He has
given us of His Spirit. Because they received the Holy Spirit, these Gentiles abided in God and God abided in them. To abide in God and to have God abide in you does not describe the condition of a lost unbeliever but a saved believer - such was the case of these Gentiles
before they were water baptized.
Before they were water baptized, these Gentiles spoke in tongues and magnified God (Acts 10:46). This New Testament gift is for those "in" not "out of" the church, which is Christ's body (Colossians 1:18,24). Therefore, by having this New Testament gift, these Gentiles were already "in" the body of Christ
before they were water baptized. We do not receive the gift of tongues, which is only for the body of Christ (1 Corinthians 12:4-12), without first receiving the gift of the Holy Spirit (indwelling, regenerating presence of the Holy Spirit). We don't receive "a" gift of the Holy Spirit until we first receive "the gift of the Holy Spirit" and these Gentiles clearly received the gift of the Holy Spirit
before they were baptized.
"Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I, that I could withstand God? When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life." Acts 11:17-18
Repentance unto life (implied in believes in Him in Acts 10:43 - repent/change of mind/new direction of this change of mind/believes in Him)
preceded water baptism. Just as we read in Acts 20:21 - testifying both to Jews and to Greeks of
repentance toward God and of faith in our Lord Jesus Christ.