Jesus did not leave us alone He gave us Holy Spirit. He is our direct connection to God. God knew from the beginning who would accept His gift of salvation in Jesus. They will be called chosen.
The Holy Spirit calls us but it up to us to accept the gift.
Acts 2:38-39
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. 39 For the promise is to you and to your children, and to all who are afar off, as many as the Lord our God will call.” The New King James Version
The Greek word used here, metanoeĊ, denotes a change of mind, will, or actions. Peter calls the people to believe that Jesus is the Messiah promised in the old testament.
Peter’s exhortation involves two actions: repentance and baptism. These are connected with two promises: forgiveness of sins and the gift of the Holy Spirit.
In Acts, Luke presents saving faith, repentance, forgiveness, baptism, and the gift of the Spirit as interrelated aspects of embracing Jesus and coming to belong to the people of God in Christ. Just as circumcision served as a visible external marker of inclusion in the covenant community of Israel, so baptism serves as the public sign and seal of a person’s solidarity with Christ and participation in the new covenant community of faith, which encompasses both Jewish and non-Jewish people. Baptism identifies a person with Jesus in His life, death, burial, and resurrection
God does not overlook or ignore sin, but graciously frees those who belong to Jesus from its condemnation and power. Before His ascension, Jesus promised to send the Spirit to dwell in those who belong to Him, enabling them to trust and follow Him as their Savior and Lord. Faithlife Study Bible
Repentance for the Judeans involved rejecting their former attitudes and opinions concerning who Jesus was.
When a person recognizes who Jesus Christ really is, the result is the desire to do what He commands. The first action that Jesus requires of a new believer is baptism, the outward expression of inward faith. The idea of an unbaptized Christian is foreign to the New Testament
Is Peter saying that we must be baptized to receive forgiveness of our sins? Scripture clearly teaches that we are justified by faith alone, not by works. The critical word in this phrase is the word for, which may also be translated “with a view to.” Peter’s message makes it clear that “remission of sins” comes to “whoever believes.” Believers are baptized in view of God’s work of forgiveness, not in order to receive that forgiveness. God’s forgiveness in Christ gives baptism its significance. Baptism is a public declaration that a person’s sins have been forgiven because of the finished work of Christ on the Cross.
The gift of the Holy Spirit was the promise of Jesus. The Holy Spirit puts us in communion with the Father and the Son. This indwelling of the Spirit is a beautiful promise of the New Covenant an indication not only that our sins are forgiven, but also that the Lord has placed His law within us.
Peter exhorted his listeners to repent. In other words, each person had to make the decision to turn away from his or her sinful habits and turn to God in faith. Then God would forgive that person’s sins and declare them righteous because of Jesus’ work on the Cross.
In first-century Israel, a father held tremendous influence in his home. When a father chose to receive Christ and be baptized, his children would follow his lead. The NKJV Study Bible
Isaiah 44:3 For I will pour water on him who is thirsty, and floods on the dry ground; I will pour My Spirit on your descendants, and My blessing on your offspring;
Joel 2:28 “And it shall come to pass afterward that I will pour out My Spirit on all flesh; your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions.
Joel 2:32 And it shall come to pass that whoever calls on the name of the LORD shall be saved. For in Mount Zion and in Jerusalem there shall be deliverance, as the LORD has said, among the remnant whom the LORD calls.
Luke 24:47 and that repentance and remission of sins should be preached in His name to all nations, beginning at Jerusalem.
Ephesians 2:13 But now in Christ Jesus you who once were far off have been brought near by the blood of Christ.