Mutual Clarification
Is a good thing, in principle, to use the theology to help steer you exegetically to say "Well, this verse, just in isolation, might mean ABC, any number of things, but meanings C and D are really inconsistent with what's said, elsewhere. So, we can pretty confidently then say that C and D are [out], right? Wee're down to options that do harmonize with the rest of the Bible. The difficulty here is the obvious one: you may too easily reject an interpretation, because it doesn't fit into your theology; but in fact, your theology is already defective. So, the trouble is it, this can have good results but it could have bad results. That's why you want to have interaction both ways, right? You're continuing to work, and you're using your passages to build your theology into correct things that were at one point mistaken in your theology, and vice versa.
Vern Poythress, 02 - Foundation of Biblical Interpretation II Christ in the Psalms I, Biblical Hermeneutics (NT123), Westminster Theological Seminary, 1994