Romans 10:14–21 explains that, despite hearing the gospel and understanding it, Israel continues to disobey. Paul works through a series of questions, showing where and how Israel has failed to accept the truth given them by God. His point is clear: the people of Israel have been given more than enough knowledge, and so they ought to recognize their Messiah. Despite that stubbornness and failure, God waits, still holding out His hands to His people.
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“Romans 10:17” Bibleref.com
17 So faith comes by hearing, and hearing by the word of God.