"The Defense of the Faith"

On page126, Cornelius Van Til writes,
"On the assumptions of the natural man logic is a timeless impersonal principle, and facts are controlled by chance. It is by means of universal timeless principles of logic that the natural man must, on his assumptions, seek to make intelligible assertions about the world of reality or chance. But this cannot be done without falling into self-contradiction. About chance no manner of assertion can be made. In its very idea it is the irrational. And how are rational assertions to be made about the irrational? If they are to be made then it must be because the irrational is itself wholly reduced to the rational. That is to say if the natural man is to make an intelligible assertion about the world of "reality" or "fact" which, according to him is what it is for no rational reason at all, then he must make the virtual claim of rationalizing the irrational. To be able to distinguish one fact from another fact he must reduce all time existence, all factuality to immovable timeless being. But when he has done so he has killed all individuality and factuality as conceived of on his basis. Thus the natural man must on the one hand assert that all reality is non-structural in nature and on the other hand that all reality is structural in nature. He must even assert on the one hand that all reality is non-structurable in nature and on the other hand that he himself has virtually structured all of it. Thus all his predication is in the nature of the case self-contradictory."