Becker deals with one more paradox, the paradox of law and gospel, which are both God's word and true and at work in the believers heart. From here we go to the simul justus et peccator.
I will quote here, because this is a quote we discussed with Steve not that long ago.
It is in the light of this distinction between law and gospel that we must understand Luther's often quoted ad almost-as-often misunderstood and misused statement, "If our adversaries quote the Scriputres against Christ, we will quote Christ against Scripture." Those words were written in a series of theses for a disputation Romans 3:28, in which Luther tried to show that justification is by faith alone without the deeds of the law. The adversaries had quoted the passages of Scripture in which it is stated that a man will be saved if he keeps the law. Luther believed this too but the "if" involved here was, he knew, an impossible condition, and so he said in the Galatians commentary that if we teach the law in the hope that by it men might be justified, we have already exceeded the limits of the law. By such a course we confuse active and passive righteousness and become "poor dialecticians," who do not rightly divide God's word. The law passages are used correctly only when they show the need of Christ. When they are used in such a way that they make Christ and his atoning work unnecessary, as though it is possible to be justified without his unmerited grace, then they are used against Christ.
...it is impossible that the Bible should contradict itself, except in the minds of senseless and hardened hypocrites. Among the pious and the intelligent it produces testimony for its Lord. If you contend that Scripture contradicts itself, go manufacture your own reconciliation. I will stay with the author of Scripture.
So the idea of "quoting Christ against Scripture" is applied within the context of a proper distinction between law and gospel, and also within the paradox of living within this simultaneously, none if which negates justification by faith in Christ alone, and is not at all saying anything to the effect that parts of scripture are contradictory or false. Rather the paradox is upheld and scripture is never wrong. Faith is above reason. Scripture is true. Justification by faith alone is true.
What is not being said by this saying is that the Bible is wrong or contradicts itself.
From The Foolishness of God by Siegbert Becker (c) 1982 Northwestern Publishing House (www.nph.net). All rights reserved. Reprinted with permission.