Ascetical Homilies of Isaac the Syrian
Λόγοι ἀσκητικοί
A verified public-domain excerpt for this text is still being set. The folio is catalogued and linked below; an original Sub Rosa rendering will follow.
What it is
Isaac of Nineveh (fl. 7th century), a Syriac monk of the Church of the East who briefly served as Bishop of Nineveh before withdrawing to the monastery of Rabban Shabur, composed homilies of extraordinary depth on prayer, silence, compunction, and divine mercy. They were translated into Greek at the Monastery of Mar Saba by Abbas Patrikios and Abrahamios — the precise date is uncertain but falls within the early medieval period — and subsequently into Arabic, Georgian, Latin, and Slavonic; a Slavonic translation from the 14th century is attributed in some sources to the Bulgarian monk Zacchaeus and in others to a disciple of Gregory of Sinai, with scholarly attribution remaining debated. Hesychast writers including Gregory Palamas and Gregory of Sinai drew explicitly on Isaac's homilies, and Seraphim of Sarov named them alongside the Philokalia among his most beloved reading.
Why it still matters
Isaac's homilies on divine mercy and the nature of tears in prayer are among the most moving texts in all of Christian literature; they are available in a complete English translation from Holy Transfiguration Monastery, Boston, and are ideal for slow, meditative reading during periods of interior dryness or grief.
Kept alongside
On Watchfulness and Holiness (Pros Theodoulos)
Πρὸς Θεόδουλον, περὶ νήψεως καὶ ἀρετῆς
Hesychios of Sinai, abbot of the monastery on Mount Sinai (date uncertain, probably 8th–9th century; not cited in sources until the 13th century), addressed this extended treatise on watchfulness to a disciple named Theodoulos, arranged in two centuries of short chapters. It teaches that watchfulness is a method of 'continual fixing and halting of thought at the entrance to the heart,' providing the fundamental technique of hesychast mental prayer in its most distilled and teachable form. Nikodemos the Hagiorite initially identified the author with the 5th-century Hesychios of Jerusalem, but modern scholarship treats them as distinct persons of different centuries. The text appears in Philokalia volume one and reached its widest circulation through the Philokalic revival, which carried it into all the court and monastic networks touched by that collection.
One Hundred Chapters on Spiritual Knowledge
Κεφάλαια ἑκατὸν περὶ τελειότητος πνευματικῆς
Diadochos of Photike (c. 400–486), bishop of a town in Epirus who participated in the Council of Chalcedon in 451, wrote one hundred compact chapters on spiritual perfection that scholars consider among the earliest sustained theological treatments of invoking the divine name in prayer as a complete spiritual method. His synthesis of continuous name-invocation with an integrated theory of spiritual attention and sobriety (nepsis) influenced Maximos the Confessor, John Climacus, Symeon the New Theologian, and ultimately the entire hesychast tradition. The text occupies a central place in Philokalia volume one, and its warmth of tone and clarity of argument have made it consistently the most recommended starting point within the collection for readers new to the Jesus Prayer.
Praktikos and Chapters on Prayer
Πρακτικός; Περὶ προσευχῆς
Evagrius Ponticus (345–399), a student of Gregory of Nazianzus at Constantinople who withdrew to the Egyptian desert, composed the Praktikos — one hundred chapters on overcoming the eight logismoi (destructive thoughts) — and the Chapters on Prayer, 153 chapters that constitute the first systematic theological account of pure or imageless prayer. Together they form the psychological and theoretical foundation on which all subsequent hesychast writing was built. Evagrius's speculative theology (including the pre-existence of souls) was condemned at the Fifth Ecumenical Council in 553, so the Chapters on Prayer circulated throughout the Byzantine period under the name of Nilus of Ancyra; modern scholars have reattributed them to Evagrius, but medieval and early modern court readers knew them only under the pseudonym. The Praktikos appears under Evagrius's own name in the Philokalia.