Thematic Bible: Who became vain

Now in the Lord I insist and protest that you must give up living like pagans; for their purposes are futile, their intelligence is darkened, they are estranged from the life of God by the ignorance which their dulness of heart has produced in them ??19 men who have recklessly abandoned themselves to sensuality, with a lust for the business of impurity in every shape and form.

But God's anger is revealed from heaven against all the impiety and wickedness of those who hinder the Truth by their wickedness. For whatever is to be known of God is plain to them; God himself has made it plain ??20 for ever since the world was created, his invisible nature, his everlasting power and divine being, have been quite perceptible in what he has made. So they have no excuse. Though they knew God, they have not glorified him as God nor given thanks to him; they have turned to futile speculations till their ignorant minds grew dark. read more.
They claimed to be wise, but they have become fools; they have exchanged the glory of the immortal God for the semblance of the likeness of mortal man, of birds, of quadrupeds, and of reptiles.