David Limbaugh, the co-author of "The Resurrected Jesus: The Church in the New Testament," joins Greg Kelly for an important conversation on the state of the Christian religion in today's secular society.

Limbaugh co-wrote this book with his daughter, Christen Limbaugh Bloom. In it, the pair focus on interpreting who Jesus was and his message in the New Testament. To that end, the elder Limbaugh answers Kelly's pointed questions on the differences between the God of the Old and New Testaments. Plus, Limbaugh gives his thoughts on how contemporary interpretations of the Bible's tales are moving society further away from knowing and accepting God.

David Limbaugh is also the brother of the late conservative talk show host Rush Limbaugh. Towards the end of the interview, David gives Greg an update on how the family is moving on 18 months after Rush's death from cancer.