Isaiah 40:3-6

40:3 A voice cries out,

“In the wilderness clear a way for the Lord;

construct in the desert a road for our God.

40:4 Every valley must be elevated,

and every mountain and hill leveled.

The rough terrain will become a level plain,

the rugged landscape a wide valley.

40:5 The splendor of the Lord will be revealed,

and all people will see it at the same time.

For the Lord has decreed it.”

40:6 A voice says, “Cry out!”

Another asks, “What should I cry out?”

The first voice responds: “All people are like grass,

and all their promises are like the flowers in the field.

Mark 1:7

1:7 He proclaimed, “One more powerful than I am is coming after me; I am not worthy to bend down and untie the strap of his sandals.

Luke 1:17

1:17 And he will go as forerunner before the Lord in the spirit and power of Elijah, to turn the hearts of the fathers back to their children and the disobedient to the wisdom of the just, to make ready for the Lord a people prepared for him.”