Or, as Loveday Alexander has argued, “It is to the biblical tradition, surely, that we should look for the origins of the ‘religious intensity’ of the gospel narratives and their rich ideological intertextuality with the biblical themes of covenant, kingdom, prophecy, and promise—all features hard to parallel in Greek biography” (“What is a Gospel,” 27-28).
So, while our gospels may be similar to Greco-Roman biography in terms of structure, they are indebted to the Old Testament in terms of their narrative. And when we consider the narrative features of the four gospels, it quickly becomes clear that they are stories of God’s eschatological, redemptive, covenant-fulfilling, activity through the person of Jesus of Nazareth.
Or, put differently, they are not merely history—which would be implied by the bios genre—but are, in fact, redemptive history. As Jonathan Pennington has observed, “This is good news, not just a biography!” (Reading the Gospels Wisely, 31)."