2 Kings 2:9-15
Preface of Lent (1)
[Common of a Monastic or Professed Religious]
[Common of a Theologian and Teacher]
[Of the Holy Spirit]
[Of the Incarnation]
PRAYER (traditional language)
Holy God, whose beloved Son Jesus Christ didst bless the pure in heart: Grant that we, together with thy servant John Cassian and in union with his prayers, may ever seek the purity with which to behold thee as thou art; one God now and for ever. Amen.
PRAYER (contemporary language)
Holy God, whose beloved Son Jesus Christ blessed the pure in heart: Grant that we, together with your servant John Cassian and in union with his prayers, may ever seek the purity with which to behold you as you are; one God now and for ever. Amen.
This commemoration appears in Lesser Feasts & Fasts 2018 with revised lessons and collects.
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Last updated: 17 July 2022
ABBOT AT MARSEILLES, 433
John Cassian (ca. 360 – 435) (Latin: Jo(h)annes
Eremita Cassianus, Joannus Cassianus, or Joannes Massiliensis), John the
Ascetic, or John Cassian the Roman, is a Christian theologian celebrated
in both the Western and Eastern Churches for his mystical writings. He
is known both as one of the "Scythian monks" and as one of the
John Cassian was born around 360 probably in the region of Scythia Minor
(now Dobruja in modern-day Romania), although some scholars assume a Gallic
He was involved in a disputation concering the Patriarch of Constantinople
(St. John Chrysostom), and, when the
Patriarch was forced into exile from Constantinople in 404, the Latin-speaking
John Cassian was sent to Rome to plead his cause before Pope Innocent
While he was in Rome John Cassian accepted the invitation to found an
Egyptian style monastery in southern Gaul, near Marseille. His foundation,
the Abbey of St Victor, a complex of monasteries for both men and women,
was one of the first such institutes in the west, and served as a model
for later monastic development. Cassian's abbey and writings influenced
St. Benedict, who incorporated many
of the same principles into his monastic rule. Since Benedict's rule is
still used by Benedictine, Cistercian, and Trappist monks, the thought
of John Cassian still guides the spiritual lives of thousands of men and
women in the Western Church.
John Cassian wrote two major spiritual works, the Institutions
In these, he codified and transmitted the wisdom of the Desert Fathers
of Egypt. The Institutes (Latin: "De institutis coenobiorum")
deal with the external organization of monastic communities, while the
Conferences (Latin: "Collationes") deal with "the
training of the inner man and the perfection of the heart."
The spiritual traditions of John Cassian had an immeasurable effect on
Western Europe. Many different western spiritualities, from that of Saint
Benedict to that of Saint Ignatius of Loyola,
owe their basic ideas to John Cassian.
— more at Wikipedia