Acts 15:8 – 9, “God, who knows the heart, showed that he accepted them by giving the Holy Spirit to them, just as he did to us. 9He made no distinction between us and them, for he purified their hearts by faith.” The Apostle Peter
In the discussion of the Jerusalem Council in Acts 15 about what is required for salvation, whether the new Gentile converts must be circumcised, in other words become Jews first, to receive salvation.
Peter explains in verses 8 – 9 above that God’s will is to give to the Holy Spirit to all men who believe whether they be Jew or Gentile. [See Peter’s sermon to Cornelius for an understanding of why Peter spoke these verses: Acts 10:34 – 48].
In fact in Acts 2:38 Peter preached this message to the Jews at Pentecost when they asked what must they do, ““Repent, and each of you be baptized in the name of Jesus Christ for the forgiveness of your sins; and you will receive the gift of the Holy Spirit….”
The question is why is receiving the Holy Spirit the unifying gift from God in salvation? Because through the Spirit the Father communicates to us , the Spirit teaches us the Word, it sanctifies us and bring us home.
Hence the goal of our preaching is to call sinners to repent of idolatry and call upon the Name of the Lord Jesus Christ to have their sins forgiven and their souls justified so they can receive the Holy Spirit.
Thus sinners receiving the Holy Spirit is the goal of our preaching.