Gregory the Great — as excerpted in the Catena Aurea on Matthew 25:14-30

“(Hom. in Ev. ix. 4.) So then we see as well the peril of the teachers if they withhold the Lord’s money, as that of the hearers from whom is exacted with usury that they have heard, namely, that from what they have heard they should strive to understand that they have not heard.”