Jenson On Inter-Testamental Unity

…the scriptural narrative is thus itself Israel’s sole construal of the Lord’s self-identity. And the evident theological differences between Israel’s Scripture and the New Testament are notoriously such as to have repeatedly tempted both Jewish and Christian theologians to see them as documents of two religions, or for Christian theologians arbitrarily to assert continuity under such theologically empty rubrics as “progressive revelation” or create it by forcible exegesis. [Robert Jenson, Systematic Theology vol. 1, 64-65]

This strikes me as a great example of sawing off the branch upon which one is sitting. Is it not a virtual commonplace now that the narratives of scripture are themselves theological? How is Jenson’s statement here not a virtual admission that Christianity lied when it said it fulfilled the Old Testament promises? Of what significance can it possibly be that, as he would put it, the Church has been guided to receive just these books as its canon, if in fact those books do not give a consistent message?

After all, from a contradiction, anything can be deduced.