Because, knowing God, they glorified him not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:

Let their eyes be darkened, that they see not, and make their loins continually to shake.

Woe to the worthless shepherd that leaveth the flock! The sword shall be upon his arm, and upon his right eye; his arm shall be clean dried up, and his right eye utterly darkened.

being darkened in understanding, estranged from the life of God by reason of the ignorance which is in them, by reason of the hardness of their hearts,

For if God spared not the angels who had sinned, but having cast them down to the deepest pit of gloom has delivered them to chains of darkness to be kept for judgment;

And angels who had not kept their own original state, but had abandoned their own dwelling, he keeps in eternal chains under gloomy darkness, to the judgment of the great day;

And bow

And Jehovah will scatter thee among all peoples, from one end of the earth even unto the other end of the earth; and thou shalt there serve other gods, whom thou hast not known, neither thou nor thy fathers, wood and stone.

and I will put it into the hand of them that afflict thee; who have said to thy soul, Bow down, that we may go over; and thou hast laid thy body as the ground, and as the street to them that went over.

I will even assign you to the sword, and ye shall all bow down in the slaughter; because I called, and ye did not answer, I spoke, and ye did not hear; but ye did what was evil in mine eyes, and chose that wherein I delight not.

General references

But Jehovah hath not given you a heart to perceive, and eyes to see, and ears to hear, to this day.

They knew not that he spoke to them of the Father.