Although written by over 40 different authors over a period of about 1500 years, the Bible presents an integrated worldview in its doctrines of God, man, law, history, and salvation. The harmony of the Biblical teaching is all the more wonderful since it represents an organic growth of revelation in the historical outworking of God's covenant relationship with His people from the original creation to the end of the world. Christians from all ages have confessed the unity of the Biblical message, but they have not all found the unity of the Bible in the same themes. Some, for example, have suggested the idea of redemption. Now the Biblical story surely is the unfolding of a redemptive drama.
Redemption is certainly one of the grand themes of the Bible.
But redemption does not seem to be a broad enough theme to include all other subjects. To be specific it does not seem broad enough to include topics like creation, which occurs before there is any need for redemption and seems to be more important in the Bible than just background information for redemption. It would be difficult with a central theme as narrow as redemption to find a proper place for other themes such as angels, Satan, fallen angels, hell, and so on. Others have suggested that the central theme of the Bible is Christ Himself. From the fall to the consummation of redemption, the Biblical message centers on the person of Christ as the Savior of the world.