20 It has always been my ambition to preach the gospel where Christ was not known, so that I would not be building on someone else’s foundation.

Read Romans 15:20 Using Other Translations

Yea, so have I strived to preach the gospel, not where Christ was named, lest I should build upon another man's foundation:
and thus I make it my ambition to preach the gospel, not where Christ has already been named, lest I build on someone else's foundation,
My ambition has always been to preach the Good News where the name of Christ has never been heard, rather than where a church has already been started by someone else.