Proverbs 10:21

10:21 The teaching of the righteous feeds many,

but fools die for lack of wisdom.

Isaiah 6:9-10

6:9 He said, “Go and tell these people:

‘Listen continually, but don’t understand!

Look continually, but don’t perceive!’

6:10 Make the hearts of these people calloused;

make their ears deaf and their eyes blind!

Otherwise they might see with their eyes and hear with their ears,

their hearts might understand and they might repent and be healed.”

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.”

Daniel 12:10

12:10 Many will be purified, made clean, and refined, but the wicked will go on being wicked. None of the wicked will understand, though the wise will understand.

Hosea 4:6

4:6 You have destroyed my people

by failing to acknowledge me!

Because you refuse to acknowledge me,

I will reject you as my priests.

Because you reject the law of your God,

I will reject your descendants.

Matthew 13:19

13:19 When anyone hears the word about the kingdom and does not understand it, the evil one comes and snatches what was sown in his heart; this is the seed sown along the path.

John 17:3

17:3 Now this is eternal life – that they know you, the only true God, and Jesus Christ, whom you sent.