Jeremiah 8:7Yea, the stork in the heaven knoweth her appointed times; and the turtle and the crane and the swallow observe the time of their coming; but my people know not the judgment of the LORD.
Isaiah 44:18They have not known nor understood: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand.
Deuteronomy 32:28-29For they are a nation void of counsel, neither is there any understanding in them. O that they were wise, that they understood this, that they would consider their latter end!
Psalms 94:8Understand, ye brutish among the people: and ye fools, when will ye be wise?
Proverbs 6:6Go to the ant, thou sluggard; consider her ways, and be wise:
Isaiah 5:12And the harp, and the viol, the tabret, and pipe, and wine, are in their feasts: but they regard not the work of the LORD, neither consider the operation of his hands.
Isaiah 27:11When the boughs thereof are withered, they shall be broken off: the women come, and set them on fire: for it is a people of no understanding: therefore he that made them will not have mercy on them, and he that formed them will shew them no favour.
Jeremiah 4:22For my people is foolish, they have not known me; they are sottish children, and they have none understanding: they are wise to do evil, but to do good they have no knowledge.
Jeremiah 9:3-6And they bend their tongues like their bow for lies: but they are not valiant for the truth upon the earth; for they proceed from evil to evil, and they know not me, saith the LORD. Take ye heed every one of his neighbour, and trust ye not in any brother: for every brother will utterly supplant, and every neighbour will walk with slanders. And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity. Thine habitation is in the midst of deceit; through deceit they refuse to know me, saith the LORD.
Jeremiah 10:8But they are altogether brutish and foolish: the stock is a doctrine of vanities.
Jeremiah 10:14Every man is brutish in his knowledge: every founder is confounded by the graven image: for his molten image is falsehood, and there is no breath in them.
Matthew 13:13-15Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand. And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive: For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Matthew 13:19When any one heareth the word of the kingdom, and understandeth it not, then cometh the wicked one, and catcheth away that which was sown in his heart. This is he which received seed by the way side.
Romans 1:28And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
2 Peter 3:5For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: