Psalm 19 and Romans 1 make this abundantly clear. To argue that the Bible and not the Christian system is the correct epistemic presupposition in that we learn the Christian system from the Bible ignores the fact that the universe within which we confront the Bible must be seen in terms of the Christian system in order to make sense of the Bible. This surely constitutes circular reasoning, and we need not shrink from it. Creation testifies to the God of the Bible, and the Bible reveals more comprehensively and clearly than creation the God to Whom creation testifies even before we come to the Bible. Creation and the Bible are complementary, not competing.
Analogy produces skepticism.
The fact that man's knowledge is analogical and not univocal as it relates to God's knowledge does not mean that it is analogical and not univocal as it relates to the Christian system of which man himself is a part. The fact that man is neither God nor shares God's knowledge does not mean man cannot know truth. The fact that they share the same objects of knowledge is not tantamount to saying that they share the same content of knowledge . Only if you give epistemology and not ontology the priority will you think otherwise. God knows differently because He is a different kind of being.