What does Ephesians 3:2 mean?

In this verse Paul chooses not to retell his account of coming to faith in Christ and his call to ministry. Instead, he assumes that the Ephesian Christians are already aware of his testimony. He had ministered among this congregation for three years. They knew his story well. When Paul talks about stewardship, he is conveying the idea that he was entrusted with a responsibility to share the gospel.

After Paul was called by Christ on the road to Damascus (Acts 9), God told Ananias in a vision, "Go, for [Paul] is a chosen instrument of mine to carry my name before the Gentiles and kings and the children of Israel. For I will show him how much he must suffer for the sake of my name" (Acts 9:15–16). Paul would minister to Gentiles, Jews, common men, and political leaders. He would also endure severe trials on behalf of Christ. While under house arrest at Rome, writing to his friends at Ephesus, all of these predictions had already been fulfilled, and were continuing to be fulfilled.