Who is Paul writing to in his letters compared to the Old Testament and the Gospels?

Les emphasizes that the Apostle Paul is the Apostle of the Gentiles, specifically called to that role. When Paul writes, he is writing primarily to Gentile believers, as over against most of the Old Testament and the Gospel accounts, which were directed to the nation of Israel and the Jew. Les says this makes a vast difference in comprehending the Scriptures, and he always tells students to ask, “To whom is this being addressed?” In the specific case at hand, Paul is writing his second letter to the congregation down at Corinth, located on the tip of Greece on the Mediterranean Sea, a little southwest of Athens. Les explains that the Corinthians were a carnal church, one of the congregations that had not begun to grow and envelop the deeper things of Paul’s teachings. The first letter to the Corinthians was a constant upbraiding and reproving of much of their carnality. One of their main problems was divisions in the church. Even in that small group there were four distinct divisions: some followed Christ and His teachings, some followed Peter, some followed Apollos, and some said they heard the gospel through Paul and would follow Paul.