Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 3
And Jesus, when He was baptized, went up straightway out of the water: and, lo, the heavens were opened unto Him, and He saw the Spirit of God descending like a dove, and lighting upon Him.
Perhaps there were before some unseen obstacles which hindered the souls of the dead from entering the skies. I suppose that since Adam’s sin no soul had mounted the skies, but the heavens were continually closed. When, lo! on Christ’s baptism they were again opened; after He had overcome by the Cross the great tyrant death, henceforward the heaven, never more to be closed, needed not gates, so that the Angels say not, ‘Open ye gates,’ for they were open, but take away the gates. (Ps. 24:7.) Or the heavens are opened to the baptized, and they see those things which are in heaven, not by seeing them with the bodily eye, but by believing with the spiritual eye of faith. Or thus; The heavens are the divine Scriptures, which all read but all do not understand, except they who have been so baptized as to receive the Holy Spirit. Thus the Scriptures of the Prophets were at the first sealed to the Apostles, but after they had received the Holy Spirit, all Scripture was opened to them. However, in whatever way we interpret, the heavens were opened to Him, that is to all, on His account; as if the Emperor were to say to any one preferring a petition for another, This boon I grant not to him but to you; that is, to him, for your sake.