For more than 70 years my father-in-law, Dr. Guy Duffield, was a Bible teacher, author, and minister. In his lifetime he wrote books on preaching, on doctrine, and on the practical Christian life.  When he was well into his 80s and living in a retirement facility, a young woman from Lebanon who worked where Dr. Duffield resided met him and showed great interest in the fact that he believed that the Bible is a supernatural book.