When God planned the great work of saving sinners, he provided two gifts. He gave his Son and he gave his Spirit. In fact each person of the Trinity was involved in the great work of salvation. The love, grace and wisdom of the Father planned it; the love, grace and humility of the Son purchased it; and the love, grace and power of the Holy Spirit enabled sinners to believe and receive it.
The first great truth in this work of salvation is that God sent his Son to take our nature on him and to suffer for us in it. The second great truth is that God gave his Spirit to bring sinners to faith in Christ and so be saved.
The Holy Spirit
Via: Of First Importance