Bede the Venerable
Catena Aurea · Lukasevangelium 3
Now when all the people were baptized, it came to pass, that Jesus also being baptized, and praying, the heaven was opened, And the Holy Ghost descended in a bodily shape like a dove upon him, and a voice came from heaven, which said, Thou art my beloved Son; in thee I am well pleased.
For not then were the heavens opened to Him whose eyes scanned the innermost parts of the heaven, but therein is shewn the virtue of baptism, that when a man comes forth from it the gates of the heavenly kingdom are opened to him, and while his flesh is bathed unharmed in the cold waters, which formerly dreaded their hurtful touch, the flaming sword is extinguished.