Major Works:
* The Institutes (or Conferences): This influential work is a collection of 24 conferences (discussions) on various aspects of monastic life and spiritual practice. It covers topics such as prayer, fasting, humility, obedience, and dealing with temptations.
* The Collations (or Conferences): Similar to the Institutes, this work features 24 dialogues on spiritual topics. However, the focus is broader, encompassing discussions on theological, philosophical, and practical matters.
* The Life of St. Antony the Great: A biography of the famous desert monk, Antony, which showcases the early ascetic tradition.
* The Letter to the Holy Fathers: A letter addressed to the monks of the Egyptian desert, offering practical advice on monastic living.
Other Writings:
* On the Incarnation of the Lord: A theological treatise on the nature of Christ.
* On the Divinity of the Holy Spirit: Another theological treatise on the Holy Spirit's nature and role.
* Several letters and homilies: Cassian also produced a number of letters and sermons on various subjects.
Cassian's writings were influential in shaping Western monasticism and have been studied and read by generations of monks, theologians, and spiritual seekers. They offer valuable insights into the early Christian world and provide practical guidance on how to live a spiritual life.