'Darkness' in the Bible

“The people who were sitting in darkness saw a great Light,And those who were sitting in the land and shadow of death,Upon them a Light dawned.”

But if your eye is bad, your whole body will be full of darkness. If then the light that is in you is darkness, how great is the darkness!

but the sons of the kingdom will be cast out into the outer darkness; in that place there will be weeping and gnashing of teeth.”

What I tell you in the darkness, speak in the light; and what you hear whispered in your ear, proclaim upon the housetops.

Then the king said to the servants, ‘Bind him hand and foot, and throw him into the outer darkness; in that place there will be weeping and gnashing of teeth.’

Throw out the worthless slave into the outer darkness; in that place there will be weeping and gnashing of teeth.

Now from the sixth hour darkness fell upon all the land until the ninth hour.