Romans 1:16-17; 15:20:
For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek. 17 For in it the righteousness of God is revealed from faith for faith, as it is written, “The righteous shall live by faith.”
Romans 15:20:
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...
