From Richard Hays:

“The Bible is just not a collection of little verses or tidbits of wisdom. When we’re reading the Gospel of Luke, for example, we’re reading a text that has a narrative shape to it. To see what’s going on in the text, you have to read the thing whole and see how the parts relate to the whole.

And the same thing applies not only to individual gospels but also, analogously, to the Bible as a whole. It has a deep and subtle narrative unity—not because unity has been superimposed by ecclesial fiat or by some clever editorial design, but because the diverse biblical witnesses bear common witness to God’s grace-filled action in the story of Israel. The emergence of the biblical writings themselves, in their complexity and diversity, is itself part of God’s mysterious “authorial” action. That’s why I believe that the Old Testament and the New have an underlying narrative unity that can be discerned only in retrospect, when we read the whole thing together.”

The rest is here:http://www.booksandculture.com/articles/2016/novdec/deep-and-subtle-unity-of-bible.html?paging=off