The Bible is to the theologian what nature is to the scientist, a body of unorganized, or only partly organized facts. God has not seen fit to write the Bible in the form of a systematic theology; it remains for us, therefore, to gather together the scattered facts and to build them up into a logical system.
Henry Clarence Thiessen (1979). “Lectures in Systematic Theology”, p.5, Wm. B. Eerdmans Publishing