"The only area of life outside of the reach of Spirit-empowered restoration is an area that was not affected by the fall of man. This, of course, means no area at all."
“The humanists want Christians to stay out of politics as Christians. The pietists agree. The humanists deny that there are valid biblical blueprints that apply to this world. The pietists agree. The humanists argue that Old Testament laws, if applied today, would produce tyranny. The pietists agree. The humanists say that the civil government should be run in terms of religiously neutral laws. The pietists agree. The humanists deny that the God of the Bible brings predictable sanctions in history against societies that do not obey His law. The pietists agree. The humanists deny that the preaching of the gospel will ever fundamentally change the way the world operates. The pietists agree. The humanists say that Christians should sit in the back of cultural bus. The pietists agree. This is why both sides hate the message of Christian Reconstruction.”
“In other words, the non-Christian needs the truth of the Christian religion in order to attack it. As a child needs to sit on the lap of its father in order to slap the father’s face, so the unbeliever, as a creature, needs God the Creator and providential controller of the universe in order to oppose this God. Without this God, the place on which he stands does not exist. He cannot stand in a vacuum.”
Cornelius Van Til, Essays on Christian Education (The Presbyterian and Reformed Publishing Company: Phillipsburg, NJ, 1979).