Of course, we all have our own "magisterium." We just don't often acknowledge it, do we? We always are interpreting things from our own context. Usually we don't even realize it, it's that subconscious. I just finished a book entitled Thinking, Fast and Slow (watch for excerpts soon) that discusses the role of the subconscious in our day-to-day functioning.
The fully rational human is an illusion. To realize we can never step fully outside ourselves is what Postmodernism is supposed to have taught us—despite what other side effects it might have had : ) The problem is we didn't learn it. I guess that's one more reason we need the "hound of heaven," the Holy Spirit, to break through our subconscious walls and show us who we are and what we can be in Christ. Now there's a phrase that is loaded with meaning, "in Christ."