Isaiah 44:18
"They have not known nor understood: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand."
Cross References (ranked by relevance)
Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not:
So I gave them up unto their own hearts’ lust: and they walked in their own counsels.
How can ye believe, which receive honour one of another, and seek not the honour that cometh from God only?
Why do ye not understand my speech? even because ye cannot hear my word.
For the LORD hath poured out upon you the spirit of deep sleep, and hath closed your eyes: the prophets and your rulers, the seers hath he covered.
And 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;
Many shall be purified, and made white, and tried; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand.
Evil men understand not judgment: but they that seek the LORD understand all things.
The ox knoweth his owner, and the ass his master’s crib: but Israel doth not know, my people doth not consider.
Every 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.
He feedeth on ashes: a deceived heart hath turned him aside, that he cannot deliver his soul, nor say, Is there not a lie in my right hand?
Assemble yourselves and come; draw near together, ye that are escaped of the nations: they have no knowledge that set up the wood of their graven image, and pray unto a god that cannot save.
Who in times past suffered all nations to walk in their own ways.
But they are altogether brutish and foolish: the stock is a doctrine of vanities.
Who is wise, and he shall understand these things? prudent, and he shall know them? for the ways of the LORD are right, and the just shall walk in them: but the transgressors shall fall therein.
Yea, they are greedy dogs which can never have enough, and they are shepherds that cannot understand: they all look to their own way, every one for his gain, from his quarter.
O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.
A brutish man knoweth not; neither doth a fool understand this.
They that make a graven image are all of them vanity; and their delectable things shall not profit; and they are their own witnesses; they see not, nor know; that they may be ashamed.
Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children: