In Light of the Whole
It is a God-given duty that we should take the content of Scripture and bring it together into a systematic whole. It is plain that we are required to know the revelation that God has given us. Yet we would not adequately know that revelation if we knew it only in its several parts without bringing these parts into relation to each other. It is only as a part of the whole of the revelation of God to us that each part of that revelation appears as it is really meant to appear. Our minds must think systematically. It is with our God-created minds, which must think systematically, that we must rework the content of revelation.
Cornelius Van Til, An Introduction to Systematic Theology (The Presbyterian and Reformed Publishing Company: Phillipsburg, NJ, 1979), 5.