Why was Paul brought into so much suffering and turmoil?

Les explains that this man was brought into all of this suffering and turmoil so that Gentiles could have the tremendous Gospel of the Grace of God. In 2 Corinthians, Paul had to defend his apostleship and authority even though he did not walk with Christ up and down the roads of Palestine. A second major point on his mind was that believers are not under Law but under Grace. These themes are preeminent in his writings, not only to the Corinthians but in the letters that follow. The Gospel he suffered for is the message that Christ died for us, was not left in the grave, arose, is alive evermore, and would go to the ends of the then-known world; its uniqueness centers on Paul's apostleship and the heart of the New Testament from Romans through Hebrews.