Isaiah 1:3
The ox knows its owner, and the donkey its master's crib, but Israel does not know, my people do not understand."
Jeremiah 8:7
Even the stork in the heavens knows her times, and the turtledove, swallow, and crane keep the time of their coming, but my people know not the rules of the LORD.
Isaiah 44:18
They know not, nor do they discern, for he has shut their eyes, so that they cannot see, and their hearts, so that they cannot understand.
Deuteronomy 32:28-29
"For they are a nation void of counsel, and there is no understanding in them.
Psalm 94:8
Understand, O dullest of the people! Fools, when will you be wise?
Proverbs 6:6
Go to the ant, O sluggard; consider her ways, and be wise.
Isaiah 5:12
They have lyre and harp, tambourine and flute and wine at their feasts, but they do not regard the deeds of the LORD, or see the work of his hands.
Isaiah 27:11
When its boughs are dry, they are broken; women come and make a fire of them. For this is a people without discernment; therefore he who made them will not have compassion on them; he who formed them will show them no favor.
Jeremiah 4:22
"For my people are foolish; they know me not; they are stupid children; they have no understanding. They are 'wise'--in doing evil! But how to do good they know not."
Jeremiah 9:3-6
They bend their tongue like a bow; falsehood and not truth has grown strong in the land; for they proceed from evil to evil, and they do not know me, declares the LORD.
Jeremiah 10:8
They are both stupid and foolish; the instruction of idols is but wood!
Jeremiah 10:14
Every man is stupid and without knowledge; every goldsmith is put to shame by his idols, for his images are false, and there is no breath in them.
Matthew 13:13-15
This is why I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
Matthew 13:19
When anyone hears the word of the kingdom and does not understand it, the evil one comes and snatches away what has been sown in his heart. This is what was sown along the path.
Romans 1:28
And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done.
2 Peter 3:5
For they deliberately overlook this fact, that the heavens existed long ago, and the earth was formed out of water and through water by the word of God,