“We are the ones God has called. We don’t come only from the Jews but we also come from the Gentiles.”
Romans 9.24 CEB
God calls people according to his sovereign grace. He has determined that those who respond in faith and obedience will be saved, independently of origin or class.
Paul does not sound arrogant here, but humbly grateful. God’s sovereignty does not deter him from evangelism, but spurs him toward it. God’s call comes through his evangelizing people.