John Trapp on Matthew 20:24

Verse 24. They were moved] They were angry at that ambition in their fellows, that themselves were deeply guilty of. So Diogines trampled Platoes pride, but with greater pride. So Crassus earnestly inveighed against covetousnesse in others, when there was not a more covetous caitiffe then he upon the earth. So Gregory the great stomaked the title of universall Bishop to the Patriarch of Constantinople, which yet himself affected, and his successour Boniface arrogated and usurped.