'Dark' in the Bible

And I have caused the blind to go, In a way they have not known, In paths they have not known I cause them to tread, I make a dark place before them become light, And unlevelled places become a plain, These are the things I have done to them, And I have not forsaken them.

Not in secret have I spoken, in a dark place of the earth, I have not said to the seed of Jacob, In vain seek ye Me, I am Jehovah, speaking righteousness, Declaring uprightness.

Who is among you, fearing Jehovah, Hearkening to the voice of His servant, That hath walked in dark places, And there is no brightness for him? Let him trust in the name of Jehovah, And lean upon his God.