Gregory the Great, on Ezek 40:3

“And he brought me in thither, and behold a man, whose appearance was like the appearance of brass, with a line of flax in his hand, and a measuring reed in his hand, and he stood in the gate.”

“And because he also committed to Scripture the very things he said, so that they might be handed down to posterity, it is rightly added: "And a measuring reed in his hand." The Lord promises concerning holy Church through another prophet, saying: "There shall spring up in her the greenness of the reed and the rush." I remember having explained this in another place, that by the reed we should understand writers, and by the rush, hearers. But since both rush and reed are accustomed to grow near the moisture of water, and both spring forth from one and the same water, and the reed indeed is taken up for writing, while with the rush one cannot write, what should we understand by the rush and the reed, except that there is one doctrine of truth which irrigates many hearers? But some who are irrigated advance in the word of God even to the point that they also become writers, that is, like reeds; but others hear the word of life, maintain the greenness of good hope and right works, yet cannot advance to writing at all. What are these in the water of God except certain rushes, so to speak? They indeed advance by growing green, but they cannot express letters at all. Our Redeemer, therefore, because He granted that the words which He spoke should also be written through the zeal of teachers, held a reed in His hand. This reed is called a reed of measure, because the very zeal of teachers is held under a certain dispensation of hidden judgment, so that it may benefit some who read, and may not be able to benefit others who read. Hence the holy apostles, when they asked the master of truth speaking to them more openly why He spoke to the crowds in parables, heard: "Because it is given to you to know the mystery of the kingdom of heaven, but to them it is not." Or certainly it is a reed of measure, because in that sacred eloquence of His which has been written for us, we recognize that there are hidden dispensations of His. For through His incomprehensible judgment, one is sent within the measure of the elect, and another is left outside, so that he may in no way deserve to belong to the number of the elect. He has therefore a measuring cord, He has in His hand a reed of measure. For he who measures a place with a cord draws the cord to one spot, withdraws it from another, and leads here what he removes from elsewhere. Thus indeed, thus does our Redeemer act in the gathering of men, while He leads some out from their iniquities, and leaves others in their iniquity. For in those whom He has deigned to gather, He drew the cord of hidden measure, and from those whom He judged should be abandoned, what else did He do but withdraw the cord? So that the good may be held within the measure of the heavenly building, and the evil may remain outside the building, in whom the good things that are supposed are not, as if without measure.”

Imported from an open dataset — not yet checked against the printed edition.