Gregory the Great — on Ezek 3:14 (Homilies on Ezekiel, Book 1, Homily 10)

“But it should be known that the more hearers advance in charity and understanding, the greater grace of the Spirit is given to the holy preachers. Hence, when the prophet had first said: "The spirit took me up, and I heard behind me the voice of a great commotion," after the voice of the great commotion of wings and wheels, and again of a great commotion, he immediately adds: "The spirit also lifted me up and took me." Why does he who had said he was already taken up by the spirit narrate that he was again elevated and taken up? But the mind of preachers advances to higher things when through them the senses of their hearers are moved to desire for almighty God. These holy preachers advance for this reason: that through their ministry the gifts of grace may be multiplied in holy Church, as it is written of this same holy Church: "Making its channels drunk, multiply its generations; in its drops it shall rejoice when it springs forth." For the channels of the Church are the holy preachers, who water the earth of our heart. But when the channels are made drunk, the generations of the Church are multiplied, because when preachers receive a more abundant grace of the spirit, the number of the faithful increases. Holy Church rejoices in its drops. For in a drop, water falls from the roof to the earth, which had fallen from heaven onto the roof. Now the roof of the Church is the holy preachers, who protect us by interceding and fortifying us with admonitions. But because their heart is divinely poured upon in preaching, water comes, as it were, from heaven onto the roof. Because we are watered by their words, water flows down, as it were, from the roof to the earth. Therefore holy Church, when it springs forth, rejoices in its drops, because when it is born in faith and good works, it considers the gifts it has received and exults in the words of preachers. Therefore, because grace is also multiplied for their preachers when hearers rise to better things, the prophet says: "The spirit also elevated me and took me up." For the preacher is elevated and taken up more and more from the very source by which the hearer is changed to a better life.”