Romans 1:20-21

1:20 For since the creation of the world his invisible attributes – his eternal power and divine nature – have been clearly seen, because they are understood through what has been made. So people are without excuse. 1:21 For although they knew God, they did not glorify him as God or give him thanks, but they became futile in their thoughts and their senseless hearts were darkened.

Romans 3:11

3:11 there is no one who understands,

there is no one who seeks God.

Proverbs 18:2

18:2 A fool takes no pleasure in understanding

but only in disclosing what is on his mind.

Isaiah 27:11

27:11 When its branches get brittle, they break;

women come and use them for kindling.

For these people lack understanding,

therefore the one who made them has no compassion on them;

the one who formed them has no mercy on them.

Jeremiah 4:22

4:22 The Lord answered,

“This will happen because my people are foolish.

They do not know me.

They are like children who have no sense.

They have no understanding.

They are skilled at doing evil.

They do not know how to do good.”

Matthew 15:16

15:16 Jesus said, “Even after all this, are you still so foolish?