'Darkness' in the Bible

And ye came near and stood under the mountain; and the mountain burned with fire to the heart of heaven, with darkness, clouds, and obscurity.

And it came to pass, when ye heard the voice from the midst of the darkness, and the mountain burned with fire, that ye came near to me, all the heads of your tribes, and your elders;

and thou shalt grope at noonday, as the blind gropeth in darkness, and thou shalt not prosper in thy ways; and thou shalt be only oppressed and spoiled continually, and there shall be none to save.