Ezekiel 40:13

(Verse 5 and following) And behold, there was a wall surrounding the house on all sides, and in the hand of the man was a measuring reed of six cubits and a handbreadth, and he measured the width of the building with the reed, one reed wide, and the height with the reed, one reed high. And he came to the gate that faced the eastern road, and he went up its steps, and he measured the threshold of the gate with the reed, one reed wide, that is, one reed wide, and the vestibule one reed long, and one reed wide, and between the vestibules five cubits, and the threshold of the gate next to the entrance of the gate inside, one reed wide. And the vestibule of the gate was eight cubits, and the front of it two cubits: but the gate itself was inward. And the chambers of the gate towards the east, three on this side, and three on that side; they measured one against another: and the fronts of the gate on both sides were of one measure. And he measured the length of the porch of the gate, ten cubits: and the breadth of the gate, thirteen cubits. And there was also a space before the chambers, one cubit on this side, and one cubit on that side: and the chambers six cubits on this side, and six cubits on that side. And he measured the gate from the roof of the chamber to its roof, a width of twenty-five cubits, door against door. Seventy: And behold, a wall on the outside of the house all around, and in the man's hand a measuring reed of six cubits and a handbreadth. So he measured the thickness of the wall, one reed; and the height, one reed. Then he went inside the gateway which faced toward the east, went up its stairs and measured the threshold of the gateway, which was one reed wide, and the other threshold was one reed wide. Each gate chamber was one reed long and one reed wide; between the gate chambers were five cubits. […]

And he measured the gate from the roof of one chamber to the roof of the other, a width of twenty-five cubits. We have often said already that the gate can signify faith, and through that same faith our Lord and Redeemer himself, the Mediator of God and men, Jesus Christ, because through the faith that is in him the entrance to life lies open. But we also not undeservedly take sacred Scripture, which opens for us that same faith into the understanding of our Redeemer, as the gate, because when it is known as it ought to be, we enter into understanding invisible things. If therefore in this place, as we have said before, the gate is understood as Scripture, we must ask what is signified by the roof of the bedchamber, what by the roof of the gate. But the bedchamber has a roof, because the mind of lovers is hidden, and the fervor of love is still in secret. The gate also has a roof, because all of Scripture indeed was written for our sake, but not all of it is understood by us. For many things in it are written so openly that they feed the little ones; but certain things are veiled with more obscure meanings, so that they may exercise the strong, inasmuch as things understood with effort are more pleasing. Some things, however, are so closed in it that while we do not understand them, recognizing the weakness of our blindness, we advance more toward humility than toward understanding. For there are certain things that speak so of heavenly matters that they lie open only to those supernal citizens remaining in their homeland, and are not yet revealed to us who are pilgrims. […]

And door against door. In this place, "contra" (against/opposite) is not placed in opposition to adversity, but to rectitude. For a door is opposite a door when one arrives by a straight path from the outer entrance to the inner one. In the knowledge of almighty God, our first door is faith, while the second is the vision of Him, to which we arrive by walking through faith. For in this life we enter through the former, so that we may afterward be led to the latter.

He measured then the gate from the roof of one little chamber to the roof of another,....