Focusing on the theological implications of Christ's nature, St. John Cassian's treatise addresses the heresy of Nestorianism and critiques various erroneous views on Christ, including those of Ebion, Cerinthus, and Pelagius. Written in 429 at the request of Leo, Archdeacon of Rome, the work is a response to the Christological controversies leading to significant church councils. Cassian emphasizes the importance of ongoing revelation through Scripture and Tradition, asserting that true understanding aligns with Catholic doctrine. His insights remain relevant in contemporary theological discussions.
John Cassian Books
Saint John Cassian was a monk and theologian celebrated for bringing the profound practices of Egyptian monasticism to the early medieval West. Possessing a strong classical education and fluency in both Latin and Greek, he became a vital conduit for these spiritual ideas. His mystical writings earned him reverence in both Eastern and Western Churches, significantly influencing figures like St. Benedict, whose monastic rule incorporated many of Cassian's foundational principles. Cassian's work fundamentally shaped the spiritual landscape of medieval Europe.





Conferences of John Cassian, (Conferences I-XXIV, Except for XII and XXII)
- 562 pages
- 20 hours of reading
This historic work by Saint John Cassian, a revered Christian theologian known for his mystical insights, is significant in both Western and Eastern Church traditions. His writings delve into themes of asceticism and spirituality, reflecting his deep theological understanding and influence on Christian thought. Cassian's contributions continue to resonate within the context of Christian mysticism and monastic practices.
The Conferences
- 502 pages
- 18 hours of reading
Focusing on Christian spiritual wisdom, this work offers valuable insights into monasticism that extend beyond the cloistered life, making it accessible to everyday readers. It presents teachings and reflections that encourage spiritual growth and contemplation, highlighting the relevance of monastic practices in daily life.
The Institutes
- 294 pages
- 11 hours of reading
Set in the fourth century during the peak of Christian Monasticism, this work by St. John Cassian offers insights into monastic life for those intrigued by its practices. It begins with a detailed portrayal of monks' attire and their prayer routines, then delves into the 'eight vices' that monks must confront on their spiritual journey. Cassian's writings serve as a guide for understanding the challenges and disciplines of monasticism, reflecting the era's religious fervor and the pursuit of spiritual growth.