Here's a snipet:
In Adam all human beings stand under condemnation (Rom 5:12–21). They have rejected general revelation (Rom 1:18–32). God’s wrath remains on them apart from belief in Jesus the Son (John 3:36). The present is the time for such belief: “Behold, now is ‘the acceptable time’; behold, now is ‘the day of salvation’” (2 Cor 6:2). Most clearly of all for our question, Paul puts all these pieces together in Rom 10:9–16 by writing in uninterrupted succession about the necessity to salvation of confessing Jesus as Lord and calling on his name, about the necessity of believing in Jesus for calling on him, about the necessity of hearing of him for believing in him, about the necessity of our preaching the gospel for people’s hearing of him, and about the necessity of sending for preaching. “So faith comes from hearing, and hearing through the word of Christ” (Rom 10:17). We can hardly fail to notice Paul’s focus on the specific message preached concerning the Lord Jesus Christ. And the repeated rhetorical questions, each beginning “How shall they . . .?” show this way of salvation to be the only way. Without the human witness here and now, an essential link is broken; the chain of salvation will not hold.