There are those who practically rank Augustine only slightly below St. Paul. Of course, there are also those who teach (and I have heard this said in person) that the Words of Our Lord Jesus Christ are remnants of the age of Law (a term connected with the Prot dispensationalist error) and that His words, for instance in the Beatitudes, are not applicable to Christians today. Furthermore, if some statement of Jesus Christ is seemingly at odds with the words of St. Paul, then the Apostle's words take precedence because they are for the so-called 'church age'.
Let that idea sink in and you'll never call a Protestant a Christian again. That's heresy on the highest level.
St. Anthony of Padua, hammer of heretics, terror of Hell, pray for us.
Immaculate Heart of Mary, triumph soon!
Most Sacred Heart of Jesus, have mercy on us.