The apostle next proceeds to set forth the proofs of the guilt of men because of which the wrath of God awaits them. And first he takes up impiety, or the evil which characterized the vast majority of the world, as later on he addresses himself to that subtler iniquity which consisted in holding the truth along with practical unrighteousness, then found among Jews as now in Christendom. This division of the subject, it will be seen, is not only closer to the language of the context but it preserves us from the mistake of such as attribute a knowledge of “the truth” to the heathen as such. In fact, verse 19 begins with the earlier of the two classes of evil we have seen distinguished in verse 18, and the subject is pursued to the end of the chapter. It is distinctively the Gentile portion, and presents the moral ground which necessitated and justified the unsparing judgment of God.
Two reasons are assigned why His wrath is thus revealed upon all impiety. The first (ver. 19, 20) is their inexcusable neglect of the testimony of creation to His eternal power and divinity; the second (ver. 21) their abandonment of the traditional knowledge of God they had as late as the day of (not Adam, but even) Noah. Thus man was unfaithful to knowledge he possessed and to evidence around him.
“Because what is to be known of God is manifest among them, for God hath manifested it to them. For the invisible things of him from the world's creation are perceived, being understood by his work, both his eternal power and divinity, so that they should be inexcusable.” The general force is plain. A few expressions may call for more detailed explanation. Τὸ γνωστόν means here, I think, not the knowledge γνςστόν or what was known of God, but as the English Version, “that which may be known” of Him. It is the knowable, rather than the known. The evidence was ample and distinct, but their eyes were dull. Next, I see no sufficient ground to take the phrase ἐν αὐτοῖς in an emphatic sense, but in one more general. Had self-knowledge been appealed to, as many conceive, it appears to me that the proper word for subjective knowledge must have been employed, and, further, the reflexive pronoun. It is expressly an objective character of knowledge which lay open in the midst; and this is confirmed by the added intimation” for God manifested it to them,” not the action of conscience, which finds its more appropriate place in chapter 2 where moral perception and conduct is discussed.
But how did God manifest to men what may be known of Him? This is answered in verse 20. For His invisible things, not all of course, but His eternal power and divinity, since the creation of the world, are perceived, being mentally apprehended by His works. The things He made were before all eyes, and, as we know, did not fail to produce convictions far above the ordinary strain of human thought prostrated by superstition and bewildered by philosophy: so much so that even the famous positivist of ancient times could not write his treatise on the world without affirming that “God, though He is invisible to every mortal being, is seen from the works themselves.”
The phrase, ἀπὸ κτίσεως κοσμου, “from the world's creation,” can signify the foundation or source of the suggestion as easily and surely as the earliest starting point of time; but the latter seems to me preferable here, because the things made by God are immediately afterward named as furnishing the groundwork for the mind to infer their Maker by.
Again, it is notorious that θειότης (from θεῖος), here translated “Godhead” in the Authorized Version has a wholly different force from θεότης (from beds God) in Col. 2:9. In the latter case it would quite fall short of the Apostle's object to predicate divinity of the person of Christ: all the fullness of the Deity, or Godhead in the strictest sense, he says, dwells in Him bodily. In the former case, there is no such distinct personality spoken of, but the more general sense that man may gather of a nature not creature but creatorial as evidenced in His works, the fruit of His power. It is a real, though the lowest, kind of testimony.
The next ground is not the knowable but the positively known. “Because, having known God, they glorified him not as God, nor were thankful, but became vain in their reasonings, and their unintelligent heart was darkened. Professing to be wise, they became fools, and changed the glory of the incorruptible God into a likeness of an image of corruptible man and birds and quadrupeds and reptiles.” (Ver. 21-23.) A traditional knowledge of God is in question; and as the former regarded man with evidence from the beginning calculated and adequate to indicate a divine first Cause, so the objective knowledge of God here spoken of was the portion of man even after the flood: indeed not till after that mighty event do we hear of idolatry. But man was unequal to the task of preserving the holy deposit; and this, because of his moral state. When they did know God, they neither glorified Him as such, nor were they thankful. This left room for vain reasonings, which again darkened the heart instead of leading it into light. It was the self-sufficiency, and so the folly, of the creature. For light is only seen in God's light, and man must sink into darkness when not morally elevated by looking up to One above him. The humbling proof appeared too soon; and philosophy but sealed the evil to which superstitious fear led the way. An unacknowledged Supreme was rapidly forgotten, and the glory of the incorruptible God exchanged for a likeness of an image of corruptible man, yea, into objects ever lowering till creation's lords, now the victim of this debasing delusion, worship the most loathsome reptile which eats the dust.
How admirably these few words refute the theory of progress in which the would-be wise have indulged in ancient and in modern times: a theory as contrary to their own vaunted reason as to fact. For what a Being could He be who would leave His intelligent and morally responsible creature, man, to grope his cheerless miserable way from the horrors of nature worship, and the darkness of polytheism to juster notions of Himself and His attributes? Where is the wisdom, where the love, where the justice of such a scheme? The error consists in reasoning from progress in material things, or even from the intellectual domain, to moral condition: progress in those Scripture admits since the fall which means the very reverse in this. No: man departed more and more from God till the flood; after it he gave up the knowledge of God for the worship of the creature. The race fell into ever increasing error and evil, till a partial revelation by Moses and the complete manifestation of God in Christ judged morally the heathen world, proving its declension, not progress, its insensibility to right reason, and its departure from true tradition into the degradation of idolatry.