Thematic Bible: Who became vain

This I say therefore, and charge you in the name of the Lord, that ye no longer walk as the rest of the Gentiles walk, in the vanity of their mind, darkened in their understanding, and alienated from the life of God, through the ignorance that is in them, by reason of the hardness of their heart: who, being past feeling, have given themselves up to lasciviousness, to commit all uncleanness with greediness.

For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who withhold the truth in unrighteousness; for what is to be known of God is manifest among them, for God hath manifested it to them. Inasmuch as from the first creation of the world, the invisible things of Him, even his eternal power and Godhead, are, if attended to, clearly seen in his works: read more.
so that they are inexcusable; because having thus known God they glorified Him not as God, neither were they thankful; but were infatuated by their own reasonings, and their heart being void of understanding was darkened. Pretending to be wise they Became fools: and changed the glory of the incorruptible God for an image like to corruptible man, and birds, and beasts, and reptiles.