And he shall go before him in the spirit and power of Elijah, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
All Commentaries on Luke 1:17 Go To Luke 1
Hippolytus of Rome
AD 235
It is a matter of course that His forerunners must appear first, as He says by Malachi and the angel,