Calvin makes a sharp distinction between the revelation of God to man and man’s response to that revelation. This implies the rejection of a natural theology such as Aquinas taught.
He makes a sharp distinction between the responses to God’s revelation made by:
(a) man in his original condition, i.e., Adam before the Fall;
(b) mankind, whose “understanding is subjected to blindness and the heart to depravity” (Inst. II.i.9)
(c) those that are “taught of Christ” through Scripture and whose eyes have been opened by the Holy Spirit.
– Cornelius Van Til, The Reformed Pastor and the Defense of Christianity & My Credo p.24
Cornelius Van Til 
Going to share this in the next round up; salivating to read more after this post from Van TIl!
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Thanks SlimJim! Have you read this book? It contains the first chapter of ‘The Reformed Pastor and Modern Thought’ along with the essay ‘My Credo’, from Jerusalem and Athens. I think the two pieces work quite well together as an introduction to Van Til. The first section also contains the story of Mr Black, Mr Grey, and Mr White that appears in ‘The Defense of the Faith’.
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I have not yet read it though I have an old physical copy.
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