An objective revelation of God is given to man, both through the world about him and through his own created nature, upon which God’s impress is unmistakable. But this knowledge man seeks to suppress. Instead, in his starting point, method, and conclusion, man takes for granted his own ultimacy, insists on being his own god and interpreter, and as a result misinterprets all things, himself, the flowers of the field and Almighty God.
My two cents
I’ve read of atheists who go to great lengths to distinguish themselves as different from humanists. While yes there are distinctions, these tend to miss the broader point of the source of their knowledge—man. An atheist can claim to deny humanism, yet still act like a humanist.
My favourite part of the above quote is its conclusion (how man can misinterpret all things when deciding he is at the top of the epistemological food chain).
Rushdoony, R.J. (1958). By What Standard: An Analysis of the Philosophy of Cornelius Van Til. Philadelphia: Presbyterian and Reformed Publishing Company. p. 11