1 Kings 6:8

The way to the upper and third [parts of the] building was made through the innermost part of the southern wall, as if by an invisible entrance, so that only its beginning might be evident from the eastern corner of the before-mentioned [southern] wall. Only he who could climb [it] knew the progress of this ascent, of which Scripture recalls: "The door in the center of the side was on the right [i.e., southern] part of the house, and they ascended by a circular stairway to the middle room and from the middle room to the third." When our Lord was suffering on the cross, "one of the soldiers opened his side with a lance, and immediately there came forth blood and water." This [prefigured] the water of baptism by which we are cleansed [from sin] and the blood of the Lord's chalice by which we are sanctified. Through these holy mysteries of his side, as a consequence of our invisible faith, we ascend from the present life of the church, in its pilgrimage on earth, to the life of heavenly blessedness that the souls of the righteous enjoy once they have laid aside their bodies. When we have recovered our [earthly] bodies at the [general] resurrection, we will pass over from that life even to the supreme glory of eternal bliss, with our faith in our Lord's passion leading the way. It is undoubtedly of this glory that Isaiah says, "In their own land they will come into possession of a double portion, undying happiness will be theirs," that is, they will receive the eternal joys of an immortal body and a happy soul together in the land of the living, which is the only land of the saints. The lowest [part of the] building signifies the present way of life of the saints; the middle [part signifies] the repose of souls that is acquired after this life; and the top [part signifies] the glory of the [final] resurrection, which will never be changed and will last forever. The door in the center of the side, which was situated in the right [i.e., southern] part of the building, and which opened up the way to the upper parts, [represents] our faith in the passion of Christ, from whose pierced right side, [while he was hanging] on the cross, there flowed forth the sacraments, by receiving which we will be able to ascend to the joys of heavenly life.

"The door of the middle side was on the right side of the house." [1 Kings 6:8] When it is said: The door of the middle side was on the right side of the house, it does not indicate, as some think, that the door through which one would enter the temple was on the southern side, that is, on the middle side of the southern wall. Otherwise, Scripture would simply say: The door of the house was positioned towards the South. But now the door, through which one would enter for the everyday services of the temple, was to the East, as Josephus reports; and the portico before its face, also open to the East, so that the equinoctial rising sun would send its rays without any obstacle through the doors of the temple and the oracle into the ark itself, which was in the Holy of Holies. Furthermore, the ascent leading to the upper house, and from the upper to the third, was on the southern side of the temple (which is the right part of the house) made in a hidden manner, having a very small door below on the East in the very corner of the right wall. Hence it is consequently added: And through the winding stairs, they would ascend to the middle chamber, and from the middle to the third. The layout of this ascent commends to us a mystery much worth remembering; for it is clear that this temple which Solomon made figuratively indicates the body of the peaceful king Christ, not only that which is His entire Church but also that which He received most sacredly from the Virgin, to be the head of the Church. Now, the door of the middle side was on the right side of the house, through which one would secretly ascend from the lower to the middle chamber, and from the middle to the third. Just as when our Lord suffered on the cross, one of the soldiers opened His right side with a lance, and immediately blood and water came out, which is the blood of our redemption, and the water of our cleansing, by whose sanctifying mysteries, cleansed and consecrated, from this life which we conduct on earth we aim towards the rest of the spirit in the future, as it were, to the upper house. And when we ascend to the rest of the spirit having been released from the flesh, we also await the ascension of our flesh in the day of resurrection, as it were to the highest chamber.