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Cornelius Van Til, in his essay “Nature and Scripture,” discusses the qualities of general (or “natural”) revelation. In this excerpt, he puts it very well when he says that creation is itself absolutely clear with regard to who God is and who we are in relation to him.
We have seen that since the fall of man God’s curse rests upon nature. This has brought great complexity to the picture. All this, however, in no wise detracts from the historical and objective perspicuity of nature. Nature can and does reveal nothing but the one comprehensive plan of God. The psalmist does not say that the heavens possibly or probably reveal the glory of God. Nor does the apostle assert that the wrath of God is probably revealed from heaven against all ungodliness and unrighteousness of men. Scripture takes the clarity of God’s revelation for granted at every stage of human history. Even when man, as it were, takes out his own eyes, this act itself turns revelational in his wicked hands, testifying to him that his sin is a sin against the light that lighteth every man coming into the world. Even to the very bottom of the most complex historical situations, involving sin and all its consequences, God’s revelation shines with unmistakable clarity. “If I make my bed in hell, behold thou art there.” (Ps. 139:8). Creatures have no private chambers.
You can read the whole essay for free (and fully above board) thanks to Westminster Theological Seminary Books, at this link. You have no excuse not to (pun entirely intentional).