… The church has embedded into the heart of its confessions the doctrine of the incomprehensibility of God. God’s being and knowledge are absolutely comprehensive; such knowledge is too wonderful for man; he cannot attain unto it. Man was not created with comprehensive knowledge. Man was finite and his finitude was originally no burden to him. Neither could man ever expect to attain to comprehensive knowledge in the future. We cannot expect to have comprehensive knowledge even in heaven. It is true that much will be revealed to us that is now a mystery to us but in the nature of the case God cannot reveal to us that which as creatures we cannot comprehend; we should have to be God ourselves in order to understand God in the depth of his being. God must always remain mysterious to man.
The significance of this point will appear more fully when we contrast this conception of mystery with the non-Christian conception of mystery that is current today even in Christian circles. The difference between the Christian and the non-Christian conception of mystery may be expressed in a word by saying that we hold that there is mystery for man but not for God while the non-Christian holds that there is either no mystery for God or man or there is mystery for both God and man.
– Cornelius Van Til, The Defense of the Faith p.35