Romans 1:5-7, “…through whom we have received grace and apostleship to bring about the obedience of faith for the sake of His name among all the nations, including you who are called to belong to Jesus Christ, to all those in Rome who are loved by God and called to be saints: Grace to you and peace from God our Father and the Lord Jesus Christ.”
Here we learn this message from God (v2-4) propels him out on a mission for God (v5-7). What is that mission? He begins with his apostolic calling again. His mission is to be what God has called him to be, an apostle. But see how he views it? He views it as something he’s received from Jesus and calls it grace. Grace! Here again is the first mention of another word which will dominate the landscape of Romans, grace. Paul didn’t become an apostle because he chose it as a career among a large list of possible careers, no. God called him into this work, God set him apart to this work, by His grace. This grace of God will, of course, be expanded on later, but here we see the beginnings of Paul’s thought on it. He believes he is what he is by the grace of God alone. Do you agree with him? Or do you believe you are what you are because of what you have done? In this we glimpse the heart of a true believer. Paul works, toils, labors, writes, plants churches, pastors churches, suffers a great deal of pain, agony, and turmoil on account of it, and ultimately dies because of it. Yet, when Paul thinks of all he’s done he doesn’t sit back and congratulate himself on his great and glorious accomplishments, no. He gives all the glory to God and confesses, ‘It was all of grace.’
After laying a foundation of the grace of God on his ministry, Paul unfolds the what, the why, and the where of his mission in v5.
The what is “…to bring about the obedience of faith…” This phrase ‘bring about’ tells us God is going to do something through Paul in the lives of those he ministers to. What will God do? He’ll bring about the ‘obedience of faith.’ Curious phrase isn’t it? On one hand we can say these two words go together. Obedience always involves faith and faith always involves obedience, they belong together like lightning and thunder. But on the other hand there is a sure order to these words we would do well to note. Just as lightning comes before thunder, so too faith always comes before and produces true obedience. So, when put together as “the obedience of faith” we learn the Jesus we have faith in is also the Lord we obey. Yes, faith alone saves, but when faith is true faith is never alone, works always follow. Or we could put it like this: the Christian isn’t one who just believes certain things, the Christian is one who lives a certain way because we believe certain things. Our whole life is a result of what we believe. That’s the what of his mission.
Now look at the why, “…to bring about the obedience of faith for the sake His name…” Paul isn’t undertaking all of this gospel endeavor for personal profit or financial gain, he is no peddler of God’s Word who can’t trusted. Paul’s grand motivation for all things is “for the sake of His name” or for His glory. This is also God’s purpose in all things, the great glory of His name. In this Paul shows himself very healthy and spiritually alive, his heart beats with the same aim as God’s heart. Does yours? It ought to. If you’re ‘why’ is anything else you’re not just off base or unhealthy or in need of an adjustment, you’re an idolater. There is no one like God and there is no God but God. He, therefore, deserves all our love, all our affection, all our praise, all our hard work, and all our obedience. His glory is our great end in all things.
Lastly, Paul’s where. Finish out v5, “…to bring about the obedience of faith for the sake His name…(where?)…among all the nations…” Not just Israel any longer, but the nations. Paul knows further on in this letter he’ll describe how God is now sovereignly working throughout all history to bring a new people together, from all nations, through the gospel. So here he begins with that in mind as he gives us the where of his mission. And as robust as this is, as grand and all encompassing as this is, to these Romans it would’ve been very personal. Why? See what he says next in v6, “…including you who are called to belong to Jesus Christ…” The nations God has called Paul to includes those in Rome.
And so, after meeting the apostle, learning his message, and learning his mission Paul concludes his greeting with sweet words in v7. “To all those in Rome who are loved by God and called to be saints: Grace to you and peace from God our Father and the Lord Jesus Christ.”
This is our message. This is our mission.
 Robert W. Yarbrough et al., ESV Expository Commentary: Romans-Galatians, ed. Iain M. Duguid, James M. Hamilton Jr., and Jay Sklar (Wheaton, Illinois: Crossway, 2020), 37.
 Douglas Moo, Romans – NICNT, 50–51.
 Martyn Lloyd-Jones, Romans – vol. 1, 169.