'Darkness' in the Bible

The people that sat in darkness Saw a great light, And to them that sat in the region and shadow of death, To them did light spring up.

But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is the darkness!

but the sons of the kingdom shall be cast forth into the outer darkness: there shall be the weeping and the gnashing of teeth.

What I tell you in the darkness, speak ye in the light; and what ye hear in the ear, proclaim upon the house-tops.

Then the king said to the servants, Bind him hand and foot, and cast him out into the outer darkness; there shall be the weeping and the gnashing of teeth.

And cast ye out the unprofitable servant into the outer darkness: there shall be the weeping and the gnashing of teeth.

Now from the sixth hour there was darkness over all the land until the ninth hour.