'Uneven' in the Bible

“Every valley shall be raised,And every mountain and hill be made low;And let the rough ground become a plain,And the rugged places a broad valley.

“I will lead the blind by a way they do not know;I will guide them in paths that they do not know.I will make darkness into light before themAnd rugged places into plains.These things I will do [for them],And I will not leave them abandoned or undone.”