Throughout all this long missionary career, the Apostle had made it his endeavour not merely to go over old ground where others had been before him, but to seek out new and virgin soil, where he might enter as a pioneer, and convey the good news of the kingdom of heaven for the first time.
Related Commentaries of Romans 15:20
Romans 15:20-21
20 Yea, so have I strived to preach the gospel, not where Christ was named, lest I should build upon another man's foundation:
21 But as it is written, To whom he was not spoken of, they shall see: and they that have not heard shall understand.