Jesus Christ is Lord of All

In this section of Acts, Peter recounts to the Jewish believers how the Holy Spirit "fell" on Gentiles while he was preaching. From this we learn that preaching is the ordinary means Jesus employs to save His chosen people from all nations.
Paul also teaches this in Romans 10:12,ff. "For there is no distinction between Jew and Greek; for the same Lord is Lord of all, bestowing his riches on all who call on him. 13 For “everyone who calls on the name of the Lord will be saved.” 14 How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching? 15 And how are they to preach unless they are sent? As it is written, “How beautiful are the feet of those who preach the good news!” 16 But they have not all obeyed the gospel. For Isaiah says, “Lord, who has believed what he has heard from us?” 17 So faith comes from hearing, and hearing through the word of Christ."