As Paul continues his explanation of the gospel and its connection to the Jews, and the implications of their rejection of the gospel as the people of God, he begins a thorough defense of the faithfulness of God. In part, the concern for Paul here is that the word of God appears to fail in relation to the nation of Israel. Due to their rejection of their Jewish Messiah, Paul addresses the certainty of the word of God and the faithfulness of God to his word. Paul first expresses his deep burden for his people, for national Israel. He then begins a lengthy discussion (6-29) of the faithfulness of God. Ultimately, the faithfulness of God is stated as the word of God has not failed. This is first addressed in connection with the promises of God to the people. This is incredibly important for us today, because it demonstrates that the Word of God has not failed; and thus, God is faithful and he will be faithful to you. We can confidently rest in the faithfulness of God to his word and to those who receive it.
Throughout Romans, Paul offers a defense of what he believes and teachers about the gospel for these believers in Rome he has not yet met. Some of them may have been questioning him, his message and how it relates to Judaism. Paul writes to explain at length the connection of Jesus, the gospel and defend it, in spite of the rejection of Jesus as the Jewish Messiah by many Jews.
