Romans 1:22
Claiming to be wise, they became fools,
1 Corinthians 8:4
Therefore concerning the eating of food sacrificed to idols, we know 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 minds of the unbelievers, so that they might not see the light of the gospel of the glory of Christ, who is the image of God.
Ephesians 4:18
they are darkened in their understanding, alienated from the life of God because of the ignorance that is in them, due to the hardness of their heart;
Ephesians 5:8
for once you were darkness, but now you are light in the Lord; walk as children of light