I have done lengthy studies in Romans and find this whole set of verses you replayed here to be so fascinating. Have you noticed the progression of 1)disregard to 2) speculation to 3) lies to 4) living in sin. Interesting stuff. Disregard = rejecting the light. Speculation = the state of returning to darkness and feeling the need to fill it with something. Lies = what it is filled with. And living in sin = Eyes adjusting to the darkness, perhaps? You seem to have started your "progression" too late in the chain. Notice verse 18: For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness.
Some translations have the word "hold" as suppressed, or repressed. The verse teaches that truth is known, (although not a total or even salvific knowlege), and men suppress it because of their unrighteousness...i.e., they know their lives do not match up with the knowlege of God that they have, and out of what the "psychobabble" schools call 'cognitive dissonance', deny knowlege of that truth.
The more it changes, the more it stays the same.
Good catch....and that certainly fits with all that I know about the sinful mind. After all, isn't that what repentence is all about - agreeing with God (and thereby the knowledge He has already revealed) about what constitutes sin?