Gregory the Great — as excerpted in the Catena Aurea on Luke 23:6-12

“(Mor. 22. c. 16.) From these words we ought to derive a lesson, that whenever our hearers wish as if by praising us to gain knowledge from us, but not to change their own wicked course, we must be altogether silent, lest if from love of ostentation we speak God’s word, both they who were guilty cease not to be so, and we who were not become so. And there are many things which betray the motive of a hearer, but one in particular, when they always praise what they hear, yet never follow what they praise.”