Isaiah 44:18

16 He burns half of it in the fire, and he roasts meat on that half. He eats the roast and is satisfied. Indeed, he warms himself and says, “Ah! I am warm; I see the fire.”

17 From the rest he makes a god, his graven image. He bows down to it and worships; he prays to it and says, “Save me, for you are my god.”

They do not comprehend or discern, for He has shut their eyes so they cannot see and closed their minds so they cannot understand.

19 And no one considers in his heart, no one has the knowledge or insight to say, “I burned half of it in the fire, and I baked bread on its coals; I roasted meat and I ate. Shall I make something detestable with the rest of it? Shall I bow down to a block of wood?”

20 He feeds on ashes. His deluded heart has led him astray, and he cannot deliver himself or say, “Is not this thing in my right hand a lie?”

This was said to Israel at a particular time, so it is wise to read it together with the surrounding text. Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
They do not comprehend or discern, for He has shut their eyes so they cannot see and closed their minds so they cannot understand.
KJV
They have not known nor understood: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand.
WEB
They don’t know, neither do they consider, for he has shut their eyes, that they can’t see, and their hearts, that they can’t understand.
ASV
They know not, neither do they consider: for he hath shut their eyes, that they cannot see; and their hearts, that they cannot understand.
DARBY
They have no knowledge, and understand not; for he hath plastered their eyes, that they may not see; and their hearts, that they may not understand.
BLB
They do not know and they do not understand, for He has covered over their eyes from seeing, their hearts from understanding.
ÅB
De skjønner intet og forstår intet; for han[^2] har klint deres øyne til, så de ikke ser, forherdet deres hjerter, så de ikke forstår.
OTB
De vet ingenting, de forstår ingenting; deres øyne er smurt over så de ikke kan se, og deres hjerter så de ikke kan forstå.
B1930
De skjønner intet og forstår intet; for han har klint deres øine til, så de ikke ser, forherdet deres hjerter, så de ikke forstår. / < Gud; JES 6, 10.>

Study notes (Tyndale)

Original text and word study

Cross references