This is simply having a comprehensive understanding of redemptive history as God has revealed Himself. He believes this is essential both in accurate interpretation of Cod's written revelation as well as essential to effective evangelism in the face of biblical illiteracy. He deals with pluralism within evangelicalism as well. There are two problems with the book. First, its size will keep many from reading it.
Ministerial pragmatism is sad, but certain.
Second, the arguments in some parts are vigorous and somewhat involved. The reader must do some thinking. Thinking is not something that comes naturally for American Christians. Thus, Carson's extraordinary grasp of so many issues can be a bit daunting. This final note is not a criticism of Carson as much as a criticism of the nonexistent Christian mind.