The Source of the Tweet May be Probelmatic

But the thesis on"Western Church history" is interesting. Is St. Augustine the primary Latin source for its "ontology of Holy Orders"? And is Latin "theology of the priesthood" based upon St. Augustine solely, or are there other Latin fathers who are sources for it?

Cassian bought the mystical theology of the Egyptian Desert as described by Evagrius of Pontus to southern France. He adapted this desert mysticism to appeal to Latin Europeans. Reforming old monasteries and building new ones. Thus beginning the Gothic revolution. pic.twitter.com/oURBEgWWGs

— OZAbbey (@9AbbeyOZ) December 19, 2020

Cassian's master was Evagrius of Pontus d399CE. Over 15 years Evagrius had interviewed & documented the greatest of the Egyptian-desert mystics. He was meticulous & thorough. A brilliant psychologist. He cataloged 9 Logosmoi, which became Cassian's 8 passions & Gregory's 7 vices. pic.twitter.com/wIMQ8EHrI3

— OZAbbey (@9AbbeyOZ) December 19, 2020

Related:

John Cassian and Augustine on Peter and on the pope via /r/Christianity https://t.co/bLf6gJXSqX

— reddit_christianity (@rd_christianity) March 13, 2018

Icon of St. John Cassian

Painting St John Cassian...https://t.co/N0aWiMBRnf

— Julia Bridget Hayes (@ikonographics) November 20, 2020