Not one single fact in this universe can be known truly by man without the existence of God. Even if man will not recognize God’s existence, the fact of God’s existence nonetheless accounts for whatever measure of knowledge man has about God…

Now if every fact in this universe is created by God, and if the mind of man and whatever the mind of man knows are created by God, it goes without saying that the whole fabric of human knowledge would dash to pieces if God did not exist and if all finite existence were not revelational of God.

Cornelius Van Til, An Introduction to Systematic Theology, 2nd ed. Edited by William Edgar (P&R, 2007), 36.