It is a very good explanation on why they are a good that should not only be defended but promoted, and shows that it is entirely in line with Christian apostolic tradition.
Novus Ordo Watch has a good article on Pope John XXII, showing that accusations of him having committed heresy are dubious since the issue he brought up was open to theological debate. Pope John XXII is often used by those who want to assert that a pope can fall into heresy as an example of this case, and many are drawing parallels to him and Bergoglio.