Great Question, Glorious Calling (Romans 10:13-14 )
[For] "everyone who calls on the name of the Lord will be saved." ¹⁴How 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? [¹⁵And how are they to preach unless they are sent? As it is written, "How beautiful are the feet of those who preach the good news!"] —Romans 10:13-14 
This is good news.
And then comes the best possible question, and subsequent questions, that could be asked.
How then will they call on Him in whom they have not believed? There’s not going to be a confession of the mouth if there’s not a believing of the heart. Okay, okay, next question.
How are they going to believe in Him of whom they have never heard? There’s not going to be any believing unless they hear about the one worthy of their faith. We’re tracking with Paul now.
Another question: how are they to hear without someone preaching? There’s not going to be any hearing about Jesus unless someone tells about Jesus.
Last question: And how are they going to preach unless they are sent? Those who tell others about Jesus have to go forth, leaving one spot and traveling to another.
So the good news of salvation to everyone who calls on Jesus is coupled with a glorious mandate: tell this good news to others. No Uncle Sam posters here. No long, skinny finger is pointing at you. This is a call more amazing than we can imagine.
There is good news! This is good news that’s meant to be told. And we’re the ones, you and me, us, we’re the ones who get to tell it.
Let us be sent. Let us go speak. Let them hear. Let them believe and call on Jesus. Then let them be sent. . . . This is how it works. Amen.