As it is written in the prophets,
Behold, I send my messenger before your face, who shall prepare your way before you.
All Commentaries on Mark 1:2 Go To Mark 1
Tertullian of Carthage
AD 220
Now he called him an “angel” on account of the great consequence of the mighty deeds which he was to accomplish, comparable to those mighty deeds of Joshua the son of Nun about whom you have read. John served in the office of a prophet to announce God’s will, as the forerunner of the Anointed One. The Spirit, speaking in the voice of the Father, called John an “angel” in accord with the promise declared by Malachi: “Behold, I send my messenger to prepare the way before me.” It is not a novelty that the Holy Spirit would call those he has appointed ministers of his power “angels.”