The ultimate source of truth in any field rests in him. The world may discover much truth without owning Christ as Truth. Christ upholds even those who ignore, deny, and oppose him. A little child may slap his father in the face, but it can do so only because the father holds it on his knee. So modern science, modern philosophy, and modern theology may discover much truth. Nevertheless, if the universe were not created and redeemed by Christ no man could give himself an intelligible account of anything. It follows that in order to perform their task aright the scientist and the philosopher as well as the theologian need Christ.
– Cornelius Van Til, The Case for Calvinism p.147-148