A quote from the linked-to “cautions for Christians against clever arguments”, to save others the pain of wading through it to figure out what it’s talking about:
It always begins the same way. They swallow first the rather subtle line that it is necessary for each to think for himself, to judge everything by the light of whether it appears reasonable to him. There is never any examination of that basic premise, though what it is really saying is that the mind of man becomes the ultimate test, the ultimate authority of all life. It is necessary for man to reason and it is necessary for him to think for himself and to examine things. But we are creatures under God, and we never can examine accurately or rightly until we begin with the basic recognition that all of man’s thinking, blinded and shadowed as it is with the confusion of sin, must be measured by the Word of God. There is the ultimate authority.
A quote from the linked-to “cautions for Christians against clever arguments”, to save others the pain of wading through it to figure out what it’s talking about: