How do we know that God calls people to preach to the Gentiles?

Acts 22 makes it clear that Paul's mission to the Gentiles is ordained by God. When Paul recounts his conversion experience, he emphasizes that he was chosen by Christ to be a vessel for His glory among the Gentiles. This reflects the Reformed perspective that God's grace extends beyond Israel to encompass all nations, showcasing His sovereign plan for redemption and fulfillment of the Old Testament prophecies. The call of Paul signifies that the Gospel is for everyone and not limited to one ethnic group, demonstrating God’s mercy that includes all mankind.