"It may therefore be already apparent that the Old Testament and the New Testament are Scripture for the church in different ways. The Old Testament was Scripture for the apostles and other disciples before they were ever the church. The language that speaks about the church adopting or taking over the Jewish canon is malaprop. ... The New Testament, on the other hand, is a product of the church...at a particular juncture of the church's history. Had the Lord returned as quickly as was first expected, the church would never have depended upon or been thought to depend upon any other Scripture than Israel's."
--Robert Jenson, "Creed, Scripture, and Their Modern Alienation," The 2009 Burns Lectures at The University of Otago, 23:00 minute mark