'Darkness' in the Bible

O generation, see ye the word of Jehovah. Have I been a wilderness unto Israel? or a land of thick darkness? wherefore say my people, We are broken loose; we will come no more unto thee?

Give glory to Jehovah 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.

Wherefore their way shall be unto them as slippery places in the darkness: they shall be driven on, and fall therein; for I will bring evil upon them, even the year of their visitation, saith Jehovah.