Römer 1:19

Because that which may be--rather, "which is." known of God is manifest in them; for God hath showed it unto them--The sense of this pregnant statement the apostle proceeds to unfold in Rom 1:20.

In this last part of the chapter the apostle applies what he had said particularly to the Gentile world, in which we may observe, I. The means and helps they had to come to the knowledge of God. Though they had not such a knowledge of his law as Jacob and Israel had (Psa 147:20), yet among them he left not himself without witness (Act 14:17): For that which may be known, etc., Rom 1:19, Rom 1:20. Observe, 1. What discoveries they had: That which may be known of God is manifest, en autois - among them; that is, there were some even among them that had the knowledge of God, were convinced of the existence of one supreme Numen. The philosophy of Pythagoras, Plato, and the Stoics, discovered a great deal of the knowledge of God, as appears by abundance of testimonies. That which may be known, which implies that there is a great deal which may not be known. The being of God may be apprehended, but cannot be comprehended. We cannot by searching find him out, Job 11:7-9. Finite understandings cannot perfectly know an infinite being; but, blessed be God, there is that which may be known, enough to lead us to our chief end, the glorifying and enjoying of him; and these things revealed belong to us and to our children, while secret things are not to be pried into, Deu 29:29. 2. Whence they had these discoveries: God hath shown it to them. Those common natural notions which they had of God were imprinted upon their hearts by the God of nature himself, who is the Father of lights. This sense of a Deity, and a regard to that Deity, are so connate with the human nature that some think we are to distinguish men from brutes by these rather than by reason. 3. By what way and means these discoveries and notices which they had were confirmed and improved, namely, by the work of creation (…