Pseudo-Chrysostom
Catena Aurea · Markusevangelium 1
John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins. And there went out unto him all the land of Judæa, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins. And John was clothed with camel’s hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey; And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose. I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.
(Vict. Ant. e Cat. in Marc.) But lest he should be thought to say this by way of comparing himself to Christ, he subjoins, Of whom I am not worthy, &c. It is not however the same thing to loose the shoe-latchet, which Mark here says, and to carry his shoes, which Matthew says. And indeed the Evangelists following the order of the narrative, and not able to err in any thing, say that John spoke each of these sayings in a different sense. But commentators on this passage have expounded each in a different way. For he means by the latchet, the tie of the shoe. (non occ.). He says this therefore to extol the excellence of the power of Christ, and the greatness of His divinity; as if he said, Not even in the station of his servant am I worthy to be reckoned. For it is a great thing to contemplate, as it were stooping down, those things which belong to the body of Christ, and to see from below the image of things above, and to untie each of those mysteries, about the Incarnation of Christ, which cannot be unravelled.