Isaiah 40:3-5

31The voice of one calling out, “2Clear the way for the Lord in the wilderness; Make 3straight in the desert a highway for our God.4Let every valley be lifted up, And every mountain and hill be made low; And let the uneven ground become a plain, And the rugged terrain a broad valley;54Then the 5glory of the Lord will be revealed, And 6all flesh will see it together; For the 7mouth of the Lord has spoken.”