Romans 1:22
Though claiming to be wise, they made fools of themselves,
1 Corinthians 8:4
So, as to eating things that have been sacrificed to idols, we are sure that an idol is nothing in the world, and that there is no God but One.
2 Corinthians 4:4
In their case, the god of this world has blinded the eyes of the unbelievers, to keep the glorious light of the good news of Christ, who is the likeness of God, from dawning upon them.
Ephesians 4:18
with darkened understanding, estranged from the life of God because of the ignorance that exists among them and because of the stubbornness of their hearts;
Ephesians 5:8
For at one time you were darkness itself, but now in union with the Lord you are light itself. You must live like children of light,