The Bible is not a book like the Koran, consisting of nothing but perfectly infallible propositions, a book that should not be translated or commented upon for fear of corrupting the incorruptible. The Bible did not fall from heaven. We do not need to wash our hands before picking it up. Inspiration did not make the writers superhuman. It did not cancel out their historicity and weaknesses, but guaranteed that through them the true testimony to Jesus Christ should come that would have lasting normativity and authority in the church. We place our trust ultimately in Jesus Christ, not in the Bible. He alone is the foundation and ground of our faith. What the Scriptures do is to present a sound and reliable testimony to who he is and what God has done for us. The marvel of it is that he has done it, not through angels, but through ordinary human beings, with all their limitations. (The Scripture Principle, 1984, p.100)
Here Pinnock provides what I believe is the first step to answering the question I asked several days ago: What theological justification do we have to call the Bible the Word of God? However, if I understand Pinnock correctly, his own answer to this question seems to be church tradition, "that entrenched in Christian thinking of every kind is a belief in the Bible as the written Word of God." (p.ix) Admittedly his purpose is to set out an understanding of what it means to say the Bible is the Word of God rather than why. Pinnock's position is quite close to biblioblogger Chris Tilling's Statement of Inerrancy (Part 1 and Part 2) that caused such a stir last week.
I hope to publish my own views defending the Bible as scripture in a few days.