John Chrysostom
Catena Aurea · Johannesevangelium 3
He that cometh from above is above all: he that is of the earth is earthly, and speaketh of the earth: he that cometh from heaven is above all. And what he hath seen and heard, that he testifieth; He that is of the earth is of the earth; i. e. is earthly, and speaketh of the earth, speaketh earthly things.
(Hom. xxx. 1) And yet he was not altogether of the earth; for he had a soul, and partook of a spirit, which was not of the earth. What means he then by saying that he is of the earth? Only to express his own worthlessness, that he is one born on the earth, creeping on the ground, and not to be compared with Christ, Who cometh from above. Speaketh of the earth, does not mean that he spoke from his own understanding; but that, in comparison with Christ’s doctrine, he spoke of the earth: as if he said, My doctrine is mean and humble, compared with Christ’s; as becometh an earthly teacher, compared with Him, (Col. 2:3) in Whom are hid all the treasures of wisdom and knowledge.