"For the Christian to undertake scholarship is to undertake a course of action that may lead him into the painful process of revising his actual Christian commitment, sorting through his beliefs, and discarding some from a position where they can any longer function as control. It may, indeed, even lead him to a point where his authentic commitment has undergone change. We are all profoundly historical creatures."Being historical means that none of our learning is final as all of it are subjected to the constraint of history, and so non-objective. It is not only the process of continuous investigation and revising that is painful. The fact that knowing the absolute tentativeness of one's current knowledge and belief is very very unsettling.
(Nicholas Wolterstorff, Reason within the Bounds of Religion [USA: Wm. B. Eerdmans Publishing Co, 1976; Second edition, 1984], p.96-97. Emphasis original.)