“How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching?” (Romans 10:14 ESV)

After quoting Joel 2:32 (also in Acts 2:21), “everyone who calls on the name of the Lord will be saved,” Paul asked a series of questions to draw out the implications of this statement for those who have yet to believe. His logic is clear: People need to hear the gospel before they can believe it. If faith comes by hearing the Word, then we must be busy about declaring it. If they do not believe after hearing the gospel, it is on them. But if they do not believe because they have not heard, is it not on us?