Bible: Darkness Light Shadow Death

Repeated words found across different books in the Bible (KJV):
Job 10:22
A land of darkness, as darkness itself; and of the shadow of death, without any order, and where the light is as darkness.

Job 12:22
He discovereth deep things out of darkness, and bringeth out to light the shadow of death.

Isa 9:2
The people that walked in darkness have seen a great light: they that dwell in the land of the shadow of death, upon them hath the light shined.

Jer 13:16
Give glory to the LORD your God, before he cause darkness, and before your feet stumble upon the dark mountains, and, while ye look for light, he turn it into the shadow of death, and make it gross darkness.

Mat 4:16
The people which sat in darkness saw great light; and to them which sat in the region and shadow of death light is sprung up.

Luke 1:79
To give light to them that sit in darkness and in the shadow of death, to guide our feet into the way of peace.