The canon is the ancient witness to what God has already accomplished and it is also the ongoing reminder of what He has yet to consummate. It is the covenant record of His past faithfulness and the unwavering promise of His faithfulness in that which is yet to come. What fits into this far exceeds the human conjectures of any interpretative community.

We must submit our (or any) interpretation of Scripture to the canon, that is, to the greater reality of what God is doing through Jesus Christ and by His Spirit.

Vanhoozer writes:

Dramatic fittingness with what God has done in Christ is the supreme criterion for truth, goodness, and beauty alike…

Christo-dramatic fittingness means canonical fittingness. We must think through the canon in order rightly to think about Jesus Christ. The standard of fittingness is specification of this “whole and complete” action. Sounds doctrine is distinguished from the dross of mere opinion only because the former accords with the commissioned testimony of the biblical authors and the latter does not.

Vanhoozer, Drama, 258