You should probably check out Steven Harris' (Theology and Biblical Studies) recent post, On finishing my studies. Some quotes:

"Perhaps the most dangerous aspect of studying theology is the questions that we begin to ask. Questions are the means by which we open up doors to exciting and challenging new adventures, but they are often also the means by which that which is familiar and comfortable can quickly unravel and fall apart."

...

"Theology was not, I quickly discovered, a matter of simply assembling proof-texts, baking them with my own presuppositions, and then voila! - producing doctrines by the dozen. Early on I learned that the most important lesson that I think anyone can ever learn in studying theology is to understand the mystery of God. For every question you answer as a theologian, you raise twenty more. We can never apprehend God or exhaust the depths of his being, we can only truly know him in wonder and in reverent awe."

It's a good post. Read it. Of course, I don't agree with everything he writes, but it will cause you to think — and that's good. So go check it out.