Isaiah 40:3-7

3The voice of him that crieth in the wilderness, Prepare ye the way of the Lord, make straight in the desert a highway for our God. 4Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight, and the rough places plain:12 5And the glory of the Lord shall be revealed, and all flesh shall see it together: for the mouth of the Lord hath spoken it. 6The voice said, Cry. And he said, What shall I cry? All flesh is grass, and all the goodliness thereof is as the flower of the field: 7The grass withereth, the flower fadeth: because the spirit of the Lord bloweth upon it: surely the people is grass.