All human communities live out of some story that provides a context for understanding the meaning of history and gives shape and direction to their lives. If we allow the Bible to become fragmented, it is in danger of being absorbed into whatever other story is shaping our culture, and it will thus cease to shape our lives as it should. Idolatry has twisted the dominant cultural story of the secular Western world. If as believers we allow this story (rather than the Bible) to become the foundation of our thoughts and actions, then our lives will manifest not the truths of Scripture but the lies of an idolatrous culture. Hence, the unity of Scripture is no minor matter: a fragmented Bible may actually produce theologically orthodox, morally upright, warmly pious idol worshipers!
Bartholomew, C. G., & Goheen, M. W., The Drama of Scripture: Finding Our Place in the Biblical Story, (Baker, 2014), 14