John Trapp on Matthew 23:25

Verse 25. Ye make clean the out-side] True Ephraimites or rather Canaanites, so they are called, Hos. 12. 7, 8. that is, meer naturall men, Ezek. 16. 4. the balances of deceit were in their hands, they loved to oppresse, yet so long as thereby they grew rich, they flattered themselves and said, In all my labours they shall [illegible: 1 word] none iniquity in me; that were sinne. Hypocrites if they can but make fair to the worldward it is enough. But as the fish Sepia is bewraied by the black colour, which she casteth out to cover her: so the hypocrite is convinced by the very shew of godlinesse, under which he hoped to have lurked. God so discovers his deceitfull courses, as that his wickednes is shew'd before the whole Congregation, Pro. 26. 26.