Romans 15:21

Romans 15:21, in plain English

Paul quotes Isaiah to show that reaching new people—those who've never heard the gospel—has always been God's plan, and this is what's driven his missionary work.

Why it's here

Paul is explaining why he's been so focused on pioneering work in new regions rather than simply visiting established churches like Rome. He's not neglecting them out of indifference; he's following Scripture's own vision of gospel expansion to the unreached.

Who's speaking

Paul, quoting the prophet Isaiah

Where it sits in the story

This echoes God's original call to Abraham—that through his descendants, all nations would be blessed. Paul sees himself as fulfilling that ancient promise by taking the gospel where it's never been heard.

The scholarly reading

Paul quotes Isaiah 52:15 to explain his missionary strategy: the gospel reaches people who have never heard it, fulfilling Old Testament prophecy about God's salvation extending to the nations.

Language and setting

Paul is justifying why he has been delayed in visiting Rome—he has been consumed with pioneering missionary work in regions without Christian witness. The quotation from Isaiah anchors his evangelistic urgency in Scripture itself, showing that spreading the gospel to the unreached is not merely his personal preference but God's revealed purpose.

Voice

Paul, the apostle, writing to the Roman church around 56-57 CE

Significance

This reflects the arc of redemptive history in which God's salvation, promised first to Israel, now extends through the risen Christ to all nations—the fulfillment of the Abrahamic covenant and the prophetic vision of Isaiah concerning universal witness to God's glory.

19by the power of signs and wonders, and by the power of the Spirit of God. So from Jerusalem all the way around to Illyricum, I have fully proclaimed the gospel of Christ.

20In this way I have aspired to preach the gospel where Christ was not known, so that I would not be building on someone else’s foundation.

21Rather, as it is written: “Those who were not told about Him will see, and those who have not heard will understand.”

22That is why I have often been hindered from coming to you.

23But now that there are no further opportunities for me in these regions, and since I have longed for many years to visit you,

Read all of Romans 15 — The strong must bear with the weak. Christ did not please himself. Paul's vision for the church is a chorus of diverse voices glorifying God together.