For people who are illiterate, or members of pre-literate societies, CBS presents the Bible as oral literature in a narrative format in an attempt to make it easier to understand and remember.
McIlwain's influence on John R. Cross led him to write "The Stranger on the Road to Emmaus", which presented the Bible in a chronological format.
Instead, CBS seeks to present Biblical stories as directly as from scripture as possible with minimal explanation.
Theological truths are better understood in oral cultures within the concrete example of a story rather than abstract principles present in literate teaching styles.
CBS attempts to present a comprehensive overview of the Bible that provides the necessary background pre-literate people with no previous exposure to the Christianity need to understand Jesus Christ and the gospel.