“Reformed theology holds to the self-sufficiency of God without compromise. It therefore rejects every form of human autonomy. Only on the assumptions of divine self-sufficiency and man’s complete dependence upon God can the difference between the Christian and the non-Christian points of view be clearly made out. Only thus can the issue be clearly drawn. The non-Christian assumes that man is ultimate, that is, that he is not created. Christianity assumes that man is created. The non-Christian assumes that the facts of man’s environment are not created; the Christian assumes that these facts are created. The Christian has derived his convictions on these matters from Scripture as the infallible Word of God. As self-explanatory, God naturally speaks with absolute authority. It is Christ as God who speaks in the Bible. Therefore the Bible does not appeal to human reason as ultimate in order to justify what it says. It comes to the human being with absolute authority. Its claim is that human reason must itself be taken in the sense in which Scripture takes it, namely, as created by God and as therefore properly subject to the authority of God.”
– Cornelius Van Til, A Christian Theory of Knowledge p.14-15
We accept this God upon Scriptural authority. In the Bible alone do we hear of such a God. Such a God, to be known at all, cannot be known otherwise than by virtue of His own voluntary revelation. He must therefore be known for what He is, and known to the extent that He is known, by authority alone. We do not first set out without God to find our highest philosophical concept in terms of which we think we can interpret reality and then call this highest concept divine. This was, as Windelband tells us, the process of the Greeks. This has been the process of all non-Christian thought. It is from this process of reasoning that we have been redeemed. On such a process of reasoning only a finite god can be discovered. It has been the nemesis of the history of the theistic proofs that this has been so frequently forgotten. Are we then left with a conflict between Faith and Reason? Have we no philosophical justification for the Christian position? Or are we to find a measure of satisfaction in the fact that others too, non-Christian scientists and philosophers as well as ourselves, have in the end to allow for some mystery in their system?
To all this we must humbly but confidently reply by saying that we have the best of philosophical justification for our position. It is not as though we are in a bad way and that we must seek for some comfort from others who are also in a bad way. We as Christians alone have a position that is philosophically defensible. The frank acceptance of our position on authority, which at first blush, because of our inveterate tendency to think along non-Christian lines, seems to involve the immediate and total rejection of all philosophy—this frank acceptance of authority is, philosophically, our very salvation. Psychologically, acceptance on authority precedes philosophical argument; but when, as epistemologically self-conscious grown-ups, we look into our own position, we discover that unless we may presuppose such a God as we have accepted on authority, the Moment will have no significance. The God that the philosophers of the ages have been looking for, a God in whom unity and diversity are equally ultimate, the “Unknown God,” is known to us by grace. It has been the quest of the ages to find an interpretative concept such as has been given us by grace.
– Cornelius Van Til, Common Grace and the Gospel p.14
It is therefore in Reformed thinking alone that we may expect to find anything like a consistently Christian philosophy of history. Romanism and Arminianism have virtually allowed that God’s counsel need not always and everywhere be taken as our principle of individuation. This is to give license to would-be autonomous man, permitting him to interpret reality apart from God. Reformed thinking, in contrast with this, has taken the doctrine of total depravity seriously. It knows that he who is dead in trespasses and sins lives in the valley of the blind, while yet he insists that he alone dwells in the light. It knows that the natural man receives not the things of God, whether in the field of science or in the field of religion. The Reformed believer knows that he himself has been taken out of a world of misinterpretation and placed in the world of truth by the initiative of God. He has had his own interpretation challenged at every point and is ready now, in obedience to God, to challenge the thinking and acting of sinful man at every place. He marvels that God has borne with him in his God-ignoring and therefore God-insulting endeavors in the field of philosophy and science as well as in the field of religion. He therefore feels compelled to challenge the interpretation the non-Christian gives, not merely of religion but of all other things as well.
– Cornelius Van Til, Common Grace and the Gospel p.12-13
Following on from The Foundation of Historical Apologetics:
“In addition to showing that Christ actually arose from the grave and that the facts recorded in the Scripture are as they are recorded as being, insofar as this can be ascertained by historical research, we must show that the philosophy of fact as held to by Christian theism is the only philosophy that can account for the facts. And these two things must be done in conjunction with one another. Historical apologetics becomes genuinely fruitful only if it is conjoined with philosophical apologetics. And the two together will have to begin with Scripture, and argue that unless what Scripture says about itself and all things else of which it speaks is true, nothing is true. Unless God as an absolutely self-conscious person exists, no facts have any meaning. This holds not only for the resurrection of Christ, but for any other fact as well.”
– Cornelius Van Til, An Introduction to Systematic Theology p.242-243