“The Reformed method of apologetics seeks to escape this nemesis. It begins frankly ‘from above.’ It would ‘presuppose’ God. But in presupposing God it cannot place itself at any point on a neutral basis with the non-Christian. Before seeking to prove that Christianity is in accord with reason and in accord with fact, it would ask what is meant by ‘reason’ and what is meant by ‘fact.’ It would argue that unless reason and fact are themselves interpreted in terms of God they are unintelligible. If God is not presupposed, reason is a pure abstraction that has no contact with fact, and fact is a pure abstraction that has no contact with reason. Reason and fact cannot be brought into fruitful union with one another except upon the presupposition of the existence of God and his control over the universe.
Since on the Reformed basis there is no area of neutrality between the believer and the unbeliever, the argument between them must be indirect. Christians cannot allow the legitimacy of the assumptions that underlie the non-Christian methodology. But they can place themselves upon the position of those whom they are seeking to win to a belief in Christianity for the sake of the argument. And the non-Christian, though not granting the presuppositions from which the Christian works, can nevertheless place himself upon the position of the Christian for the sake of the argument.”
– Cornelius Van Til, A Christian Theory of Knowledge p.18
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
If man does not own the authority of Christ in the field of science, he assumes his own ultimate authority as back of his effort. The argument between the covenant-keeper and the covenant-breaker is never exclusively about any particular fact or about any number of facts. It is always, at the same time, about the nature of facts. And back of the argument about the nature of facts, there is the argument about the nature of man. However restricted the debate between the believer and the non-believer may be at any one time, there are always two world views ultimately at odds with one another. On the one side is a man who regards himself as being unable to find an intelligible interpretation of experience without reference to God as his Creator and to Christ as his Redeemer. On the other side is the man who is certain that he cannot find any such an interpretation. He assumes that there resides with him the power to make a universal negative statement about the nature of all reality.
The scientist who is a Christian therefore has the task of pointing out to his friend and colleague, who is not a Christian, that unless he is willing to stand upon the Christian story with respect to the world which has been redeemed through Christ, there is nothing but failure for him. Scientific effort is utterly unintelligible unless it is frankly based upon the order placed in the universe of created facts by Christ the Redeemer.
– Cornelius Van Til, The Protestant Doctrine of Scripture
The non-Christian scientist must be told that he is dealing with facts that belong to God. He must be told this, not merely in the interest of religion in the narrower sense of the term. He must be told this in the interest of science too, and of culture in general. He must be told that there would be no facts distinguishable from one another unless God had made them and made them thus. He must be told that no hypothesis would have any relevance or bearing on these same facts, except for the providence of God. He must be told that his own mind, with its principles of order, depends upon his being made in the image of God. And then he must be told that if it were not for God’s common grace he would go the full length of the principle of evil within him. He would finish iniquity and produce only war. His very acts of courtesy and kindness, his deeds of generosity, all his moral good is not to be explained, therefore, in terms of himself and the goodness of his nature but from God’s enabling him to do these things in spite of his sinful nature. “Will you not then repent in order to serve and worship the Creator more than the creature?”
– Cornelius Van Til, Common Grace and the Gospel p.165-166
The non-Christian holds that pure chance and absolute fate are equally ultimate and mutually correlative limiting concepts or heuristic principles which man uses to explain the fact that we have learned much about the world, that there is order in the world, a uniformity, while there is also continual change and development. But the non-Christian’s “explanation” is no explanation at all. To say “it just happens” as an explanation of an event is really to say, “There is no explanation that I know of.”
The Calvinist, therefore, using his point of contact, observes to the non-Christian that if the world were not what Scripture says it is, if the natural man’s knowledge were not actually rooted in the creation and providence of God, then there could be no knowledge whatsoever. The Christian claims that non-Christians have made and now make many discoveries about the true state of affairs of the universe simply because the universe is what Christ says it is. The unbelieving scientist borrows or steals the Christian principles of creation and providence every time he says that an “explanation” is possible, for he knows he cannot account for “explanation” on his own. As the image-bearer of God, operating in a universe controlled by God, the unbeliever contributes indirectly and adventitiously to the development of human knowledge and culture.
… the Christian offers the self-attesting Christ to the world as the only foundation upon which a man must stand in order to give any “reasons” for anything at all. The whole notion of “giving reasons” is completely destroyed by any ontology other than the Christian one. The Christian claims that only after accepting the biblical scheme of things will any man be able to understand and account for his own rationality.
– Cornelius Van Til, My Credo (Jerusalem and Athens) p.17-18
The existence of the God of Christian theism and the conception of his counsel as controlling all things in the universe is the only presupposition which can account for the uniformity of nature which the scientist needs. But the best and only possible proof for the existence of such a God is that his existence is required for the uniformity of nature and for the coherence of all things in the world. We cannot prove the existence of beams underneath a floor if by proof we mean that they must be ascertainable in the way that we can see the chairs and tables of the room. But the very idea of a floor as the support of tables and chairs requires the idea of beams that are underneath. But there would be no floor if no beams were underneath. Thus there is absolutely certain proof for the existence of God and the truth of Christian theism. Even non-Christians presuppose its truth while they verbally reject it. They need to presuppose the truth of Christian theism in order to account for their own accomplishments.
– Cornelius Van Til, The Defense of the Faith p.125-126
The discussion between the two positions must therefore be one that takes place for the sake of the argument. This means that each takes his place, hypothetically only, upon the pre-supposition of the other in order to see what happens to human experience.
Since the Christian must seek to win the non-Christian, it is he who should first be ready to think himself sympathetically into the position of the party he is trying to win. He therefore listens patiently to all the objections that the non-Christian has against the Christian position. But he at once sees that all these objections rest upon one fundamental assumption, the assumption of man’s ultimacy. And therefore the real question between the two positions has not even been touched unless it be asked upon what foundation the non-Christian can make his objections to Christianity intelligible. On what foundation rest the guns which he directs against the Christian position?
When this question is considered, it appears that this placement is the truth of Christianity itself. 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, The Dilemma of Education p.40-41
Now the only argument for an absolute God that holds water is a transcendental argument. A deductive argument as such leads only from one spot in the universe to another spot in the universe. So also an inductive argument as such can never lead beyond the universe. In either case there is no more than an infinite regression. In both cases it is possible for the smart little girl to ask, “If God made the universe, who made God?” and no answer is forthcoming. This answer is, for instance, a favorite reply of the atheist debater, Clarence Darrow. But if it be said to such opponents of Christianity that, unless there were an absolute God their own questions and doubts would have no meaning at all, there is no argument in return. There lie the issues. It is the firm conviction of every epistemologically self-conscious Christian that no human being can utter a single syllable, whether in negation or in affirmation, unless it were for God’s existence. Thus the transcendental argument seeks to discover what sort of foundations the house of human knowledge must have, in order to be what it is.
– Cornelius Van Til, A Survey of Christian Epistemology p.11