Gregory the Great — on Ezek 40:16 (Homilies on Ezekiel, Book 2, Homily 5)

“And likewise there were windows round about within in the vestibules. After he said there were windows in the fronts, he adds windows in the vestibules round about on the inside, because not only do the lofty members of holy Church who stand out have the grace of contemplation, but often even those members receive this gift who, although they already spring up toward the highest things through desire, nevertheless still lie low through their office. For unless almighty God poured the light of contemplation even into those who seem despised, there would not have been windows in the vestibules. And so we see some who are placed in the highest positions of holy Church speaking lofty things about heavenly matters, searching out with wondrous zeal, insofar as the illuminated mind suffices, the secrets of the heavenly fatherland: these are windows in the fronts. But others are contained within the bosom of holy Church and seem despised in human eyes, yet within themselves they are occupied with the pursuits of wisdom, they yearn for heavenly things, and insofar as they are able, they consider what the eternal joys may be: these therefore are oblique windows, but in the vestibules. It is well said "round about," because all inquiry into hidden things involves a circuit, since in its cogitation the mind says: "Do you suppose it is this? Do you suppose it is that?" It goes around, as it were, in order to find what it seeks. When the uncircumscribed light begins to break forth into knowledge, it is as though a ray of truth comes through an oblique window. For thus in our contemplation we make progress by circling around many things in our thoughts, just as we often seek examples of good people in order to make progress in our conduct. For when the mind is already thinking of passing on to better things, it seeks out whatever better thing it can hear about from others; it examines now the life of this holy person, now of another. Hence a certain chosen one, who had cast the eyes of his mind throughout the whole world in the broad embrace of Holy Church, seeking the life of good people for imitation, said: "I will go about and sacrifice in the tabernacle of God a sacrifice of jubilation." Behold, in order to sacrifice a sacrifice of jubilation, he was going about, because unless he sent his mind here and there to seek out the life of good people, he himself would not arrive at the sacrifice of jubilation. But when holy men are brought to the highest places within Holy Church, their life is set as if in a mirror, so that all may see the good things they ought to imitate.”