Ancient Hebrew Poetry has a great post about reading scripture. The point as a whole is that (a) we always read scripture in the light of our existing cultural norms, and we can't get away from that, but (b) we should always be allowing our cultural norms to be informed by and judged by scripture.
The two poles that are often setup for us are:
But the really important thing is that Augustine sees Scripture as norma normans (the norm that norms all other norms) which nevertheless gives rise to norma normata (norms normed by it and derived from it, such as the Nicene Creed) which in turn serve to focus and provide criteria for the interpretation of the norm.
So, imposing an exterior hermeneutical criteria is not necessarily anti-scriptural, so long as that hermeneutic is itself open to revision from scripture.