Bonaventure — on Rev 3:12 (Collations on the Hexaemeron, Collation 23)

“This passage establishes that it was those who were upon Mount Sion who were sealed; also, that one of the angels who were to pour out the bowls — and, fittingly, it was the sixth — showed him the city the measure of which was a hundred and forty-four cubits. Toward the beginning of the Apocalypse, it is said of the sixth angel, that of Philadelphia: "He who overcomes, I will make him a pillar in the temple of my God. And I will write upon him the name of my God, and the name of the city, the new Jerusalem," which is mentioned only in the end. There are six times, of which the sixth has three periods and repose. And as Christ came in the sixth time, so it is fitting that the contemplative Church be born at the end. For the contemplative Church and the soul do not differ, except that the soul has within itself that which the Church has within many. For any contemplative soul has some measure of perfection through which to see the visions of God.”