Modern Scholarship on St. Isaac the Syrian

The last four decades have transformed the study of Isaac of Nineveh from a peripheral exercise in Syriac patristics into one of the most productive fields in late antique Christian scholarship. What was known of Isaac before 1983 rested almost entirely on a medieval Greek translation of a fraction of his Syriac output; what is known now rests on critically edited Syriac texts, multiple complete or partial parts of his corpus, and monographic studies by scholars in multiple languages. The twin anchors of this recovery are Sebastian Brock, who discovered and edited the Second Part, and Hilarion Alfeyev, whose monograph remains the standard thematic synthesis.

Tradition: Pan-Orthodox (Church Father / East Syrian)

The Situation before 1983

For most of the twentieth century, Isaac of Nineveh was accessible to Western and Orthodox readers almost exclusively through a single channel: the medieval Greek translation produced at the Palestinian monastery of Mar Saba in the eighth or ninth century (on this transmission see The Rediscovered Parts). That translation covered what is now called the First Part — a collection of eighty-two ascetical discourses — and it had circulated widely in Byzantine monasticism and eventually in Slavic Orthodox Christianity. The standard scholarly Syriac edition of the First Part was Paul Bedjan’s Mar Isaacus Ninivita: De Perfectione Religiosa (Paris/Leipzig, 1909), and the standard English translation was A. J. Wensinck‘s Mystic Treatises by Isaac of Nineveh (Amsterdam, 1923), made from Bedjan’s text.

Wensinck’s translation served scholars for sixty years and made the ascetical homilies accessible to theologians and monastics who lacked Syriac. But the picture it gave of Isaac was necessarily incomplete. It presented a figure of great spiritual depth but without the full theological architecture that the untranslated portions of his Syriac corpus would reveal. Above all, the passages in which Isaac addresses eschatology with the greatest daring — the restoration of all rational beings, the end of punishment, the final prevalence of divine mercy — were either absent from Wensinck’s text or present only in attenuated form. The reasons were partly textual (these passages appear most fully in the Second Part) and partly translational (Wensinck, like Bedjan, was working with what was available). The standard devotional Orthodox translation, produced by the Holy Transfiguration Monastery (Boston, 1984; revised 2nd ed. 2011), similarly rested on the First Part and on the Greek tradition.

Sebastian Brock and the Discovery of the Second Part

The decisive turn in Isaac scholarship came in 1983, when Sebastian Brock (b. 1938), Professor of Syriac Studies at the University of Oxford and the foremost scholar of Syriac Christianity in the modern period, identified a manuscript at the Bodleian Library — MS Bodleian Syr. e. 7 — as containing a previously unknown collection of Isaac’s writings. This collection, which Brock designated the Second Part, comprised forty-one chapters (of which chapters IV through XLI were previously unknown) and included some of Isaac’s most sustained theological writing, including the “Chapters on Knowledge” (Kephalaia gnostika) — three centuries of brief, dense theological aphorisms — and extended reflections on divine love, eschatological hope, and the nature of Gehenna.

Brock edited and translated the Second Part as Isaac of Nineveh: “The Second Part,” Chapters IV–XLI, CSCO 554–555 (Peeters, 1995) — volumes 224–225 of the Corpus Scriptorum Christianorum Orientalium, the premier series for Eastern Christian texts. This edition, with facing Syriac and English, is the foundation of all subsequent work on the Second Part and made accessible to the wider scholarly community material that had been circulating only among specialists in Syriac manuscripts (Sebastian Brock, ed./tr., Isaac of Nineveh: “The Second Part,” Chapters IV–XLI, CSCO 554–555, Peeters, 1995).

Brock also provided the essential account of how Isaac’s writings traveled from their Syriac original into the Greek and later Slavic traditions. In “Syriac into Greek at Mar Saba” (OLA 98, 2001) he documented the Mar Saba translation as the principal vector through which the First Part entered Byzantine Christianity — a translation produced in a bilingual Syriac-Greek monastic environment in Palestine and then carried into the Byzantine world where it lost its attribution to a bishop of the Church of the East and became simply a Greek Father of prayer. A complementary study, “From Qatar to Tokyo, by way of Mar Saba” (ARAM 11–12, 1999/2000), traced the extraordinary geographical and temporal arc of Isaac’s textual transmission, from his original East Syrian context through the Palestinian translation and into the diverse world-wide communities that have read him since [Disputed: the exact pagination of Brock’s “From Qatar to Tokyo” in ARAM 11–12 (1999/2000) is given variously in secondary references; the article itself is securely attested].

Brock’s other major contributions to Isaac studies include the standard reference article “Isḥaq of Nineveh” in the Gorgias Encyclopedic Dictionary of the Syriac Heritage (Gorgias, 2011) — the authoritative reference work on Syriac Christianity — and two volumes of selected sayings that have brought Isaac’s wisdom to a broader readership: The Wisdom of Saint Isaac of Nineveh (SLG Press, Oxford, 1997), a compact selection, and the expanded bilingual edition The Wisdom of Isaac of Nineveh: A Bilingual Edition, Texts from Christian Late Antiquity 1 (Gorgias, 2006), containing 153 selected sayings — a number chosen to echo the 153 fish of John 21:11, that gospel moment of miraculous abundance that patristic tradition read as a figure of the fullness of spiritual teaching (Sebastian Brock, The Wisdom of Isaac of Nineveh: A Bilingual Edition, TeCLA 1, Gorgias, 2006).

Hilarion Alfeyev and the Standard Monograph

The standard monographic study of Isaac’s theology is Hilarion Alfeyev‘s The Spiritual World of Isaac the Syrian, Cistercian Studies Series 175 (Kalamazoo: Cistercian Publications, 2000), with a foreword by Bishop Kallistos Ware — himself one of the principal mediators of Orthodox theology to the English-speaking world and a tireless advocate for Isaac’s importance. The book was Alfeyev’s doctoral work, produced while he was a priest-scholar; he subsequently became Metropolitan Hilarion of Volokolamsk of the Russian Orthodox Church and head of its Department of External Church Relations, one of the most prominent Orthodox hierarchs of the early twenty-first century. The Spiritual World stands, however, as an independent scholarly achievement that predates and is analytically separable from his later ecclesiastical career.

Alfeyev’s book is a thematic synthesis drawing on both the First and Second Parts (the CSCO 554–555 edition having appeared five years earlier). It moves through the major theological categories of Isaac’s thought — the nature of God as absolute love, the primacy of divine mercy over divine justice, the theology of prayer and the stages of the interior life, the phenomenon of tears (penthos) as the cardinal ascetical experience, and the eschatological question of the ultimate destiny of rational creatures — presenting each theme with close attention to the Syriac texts and situating Isaac within the broader current of East Syrian mystical theology (Hilarion Alfeyev, The Spiritual World of Isaac the Syrian, Cistercian Studies 175, Kalamazoo, 2000).

The volume remains indispensable because it performs a synthesis that the critical editions, by their nature, do not attempt: it shows Isaac as a unified theological thinker rather than a compiler of ascetical counsels, and it does so in a way that is accessible to readers without Syriac. Together with Brock’s editorial work, Alfeyev’s monograph constitutes the core of what any serious student of Isaac must read. For the specifically eschatological dimension of Isaac’s thought, see also Isaac and the Last Things.

Critical Editions and the Full Corpus

The scholarly recovery of Isaac rests on a succession of critical editions that have progressively expanded the accessible corpus. The following represents the current state of the edited text:

The First Part remains foundational in Bedjan’s 1909 Syriac edition (Mar Isaacus Ninivita: De Perfectione Religiosa, Paris/Leipzig, 1909) and Wensinck’s 1923 English translation (Mystic Treatises by Isaac of Nineveh, Amsterdam, 1923). The Holy Transfiguration Monastery translation (2nd ed., Boston, 2011) provides the standard English rendering used in Orthodox communities and incorporates some corrections from the Syriac.

The Second Part rests entirely on Brock’s CSCO 554–555 edition (Peeters, 1995). Within the Second Part, the three “Centuries” (chapters I–III) — the Kephalaia gnostika — were separately studied and edited with a critical apparatus by Paolo Bettiolo, whose work on these chapters illuminated their relationship to the Kephalaia tradition of Evagrius Ponticus and the broader East Syrian mystical corpus (Paolo Bettiolo, edition of the Centuries of the Second Part).

The Third Part — a further collection of Isaac’s writings discovered in Syriac manuscripts and shown to be authentic — was edited and translated by Sabino Chialà as Isacco di Ninive, Terza Collezione, CSCO 637–638 (Peeters, 2011), adding substantially to the known extent of Isaac’s output and confirming the themes of mercy and eschatological hope that dominate the Second Part (Sabino Chialà, Isacco di Ninive, Terza Collezione, CSCO 637–638, Peeters, 2011). Chialà is also the author of the most important Italian monograph on Isaac: Dall’ascesi eremitica alla misericordia infinita: Ricerche su Isacco di Ninive e la sua fortuna (Florence: Olschki, 2002), a major study of Isaac’s ascetical theology and its transmission history (Sabino Chialà, Dall’ascesi eremitica alla misericordia infinita, Florence: Olschki, 2002). For the question of what can confidently be attributed to Isaac across these collections, see What Belongs to Isaac?

English translations of material from the newer portions of the corpus have been produced by Mary T. Hansbury, whose Isaac the Syrian’s Spiritual Works (Gorgias, 2016) makes selected texts available in readable English, complementing both the CSCO volumes and the Holy Transfiguration Monastery translation.

The Greek tradition received its own critical edition with Marcel Pirard’s edition of the Greek Ascetical Homilies, produced at the monastic press of Iviron Monastery, Mount Athos (2012) — a landmark for the Byzantine reception of Isaac, establishing the critical text of the translation through which he was known to the Greek and Slavic Orthodox worlds for over a millennium (Marcel Pirard, ed., critical Greek edition, Iviron, 2012).

The State of the Field

The transformation of Isaac scholarship over the last forty years is without parallel in late antique Syriac studies. In 1975, Isaac was a name attached to an important but poorly understood Greek ascetical text; by 2015 he was a figure whose full Syriac corpus, ecclesial context, textual transmission, and theological system had been substantially established through critical editions in a major series and monographic studies in multiple languages.

The questions that remain open are principally theological and historical: the precise nature of Isaac’s relationship to Evagrian Origenism (the tradition of the Alexandrian ascetical theologian Evagrius Ponticus, d. 399, whose influence on East Syrian mysticism is pervasive); the degree to which his eschatological positions represent a personal synthesis or a received East Syrian tradition; and the ongoing work of editing and translating the Third Part and any additional manuscript material. These are questions addressed in the companion essays on the corpus (The Rediscovered Parts) and on Isaac’s theology of the last things (Isaac and the Last Things).

What is not in question is the scale of the achievement. Brock’s discovery and edition of the Second Part, Alfeyev’s synthesis, Chialà’s edition of the Third Part and Italian monograph, Hansbury’s translations, Pirard’s critical Greek edition, and Bettiolo’s work on the Centuries collectively represent a sustained international scholarly project that has given the Christian world back a writer it had only partially known. The Isaac available to readers today — theologian of universal mercy, theorist of the highest prayer, teacher of compunction and tears — is a far more complete figure than the one available to any previous generation (see also Text and Translation).

For the veneration that has accompanied and in some respects been deepened by this scholarly recovery, see Veneration. For the ecclesial question that the scholarship necessarily illuminates, see A Saint across the Divide.

References

Sebastian Brock, “Isḥaq of Nineveh,” in Gorgias Encyclopedic Dictionary of the Syriac Heritage (Gorgias, 2011).
Sebastian Brock, The Wisdom of Saint Isaac of Nineveh (SLG Press, Oxford, 1997).
Sebastian Brock, The Wisdom of Isaac of Nineveh: A Bilingual Edition, Texts from Christian Late Antiquity 1 (Gorgias, 2006).
Sebastian Brock (ed./tr.), Isaac of Nineveh: “The Second Part,” Chapters IV–XLI, CSCO 554–555 (Peeters, 1995).
Sebastian Brock, “Syriac into Greek at Mar Saba,” Orientalia Lovaniensia Analecta 98 (2001).
Sebastian Brock, “From Qatar to Tokyo, by way of Mar Saba,” ARAM 11–12 (1999/2000).
Hilarion Alfeyev, The Spiritual World of Isaac the Syrian, Cistercian Studies Series 175 (Kalamazoo: Cistercian Publications, 2000).
Paul Bedjan, Mar Isaacus Ninivita: De Perfectione Religiosa (Paris/Leipzig, 1909).
A. J. Wensinck, Mystic Treatises by Isaac of Nineveh (Amsterdam, 1923).
Sabino Chialà, Isacco di Ninive, Terza Collezione, CSCO 637–638 (Peeters, 2011).
Sabino Chialà, Dall’ascesi eremitica alla misericordia infinita: Ricerche su Isacco di Ninive e la sua fortuna (Florence: Olschki, 2002).
Mary T. Hansbury (tr.), Isaac the Syrian’s Spiritual Works (Gorgias, 2016).
Marcel Pirard (ed.), critical Greek edition of the Ascetical Homilies (Iviron, Mount Athos, 2012).
The Ascetical Homilies of Saint Isaac the Syrian, trans. Holy Transfiguration Monastery, 2nd ed. (Boston, 2011).