Our Lord’s strong language about the false teachers of the Jews ends here. Those who think that unsound ministers ought never to be exposed and held up to notice, and men ought never to be warned against them, would do well to study this passage. No class of character throughout our Lord’s ministry seems to call forth such severe denunciation as that of false pastors.

The reason is obvious. Other men ruin themselves alone : false pastors ruin their flocks as well as themselves. To flatter all ordained men, and say they never should be called unsound and dangerous guides, is the surest way to injure the Church and offend Christ. (Expository Thoughts on the Gospels, Vol. 3, 195)

J.C. Ryle