The conception of man as entertained by modern thought in general cannot be assumed to be the same as that set forth in Scripture. It is therefore imperative that the Christian apologist be alert to the fact that the average person to whom he must present the Christian religion for acceptance is a quite different sort of being than he himself thinks he is. A good doctor will not prescribe medicines according to the diagnosis that his patient has made of himself. The patient may think that he needs nothing more than a
bottle of medicine while the doctor knows that an immediate operation is required.
Christianity then must present itself as the light that makes the facts of human experience, and above all the nature of man himself, to appear for what they really are. Christianity is the source from which both life and light derive for men.
– Cornelius Van Til, The Defense of the Faith p.92