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© 2026 · 1.3 · Public-domain texts unless otherwise noted.

Saints

It
Icon of St. Isaac the Syrian

“of Nineveh”

St. Isaac the Syrian

Bishop of Nineveh · Hermit of the Mountain

The seventh-century hermit-bishop whose homilies on repentance, stillness, and the boundless mercy of God became one of the most beloved guides to the inner life across the whole Orthodox world.

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Born
7th c. (Beth Qatraye)
Reposed
Late 7th c. (Mesopotamia)
See
Nineveh
Feast
January 28

His life

Isaac was born in the seventh century in Beth Qatraye, the region along the western shore of the Persian Gulf, near the modern Qatar. From his youth he embraced the monastic life, devoting himself to the reading of Scripture, to silence, and to unceasing prayer, until his holiness became widely known.

He was consecrated bishop of Nineveh, in the land of the Assyrians, by the Catholicos George. But after only five months he asked to lay down the office and return to the solitude he loved. He withdrew to the wilderness of the mountain of Matout, and afterward to the monastery of Rabban Shabur in the mountains of Khuzistan, where he gave himself wholly to ascetic struggle and the contemplation of God.

In his old age, the tradition relates, he lost his sight from his constant reading and weeping over the Scriptures, and he dictated his teachings to his disciples. He reposed in great old age and was buried at the monastery of Rabban Shabur. His writings, gathered as the Ascetical Homilies, treat of repentance and compunction, of tears and stillness, of humility, and above all of the mercy of God, which he calls a heart burning for all creation.

Isaac lived and served within the Church of the East, beyond the eastern frontier of the Roman empire, in a body separated from the imperial Church by the controversies of the fifth century. Yet his ascetical writings, free of those disputes and wholly given to the life of prayer, were received with love throughout the Orthodox Church. Translated into Greek at the Lavra of St. Sabas, they passed into Slavonic and into every Orthodox land, and have been treasured by the monks of Athos, by the elders of Optina, and by countless faithful, as among the surest guides to the heart's return to God.

The Greek and Slavic Churches keep his memory on the twenty-eighth of January, with St. Ephraim the Syrian, honouring the two great fathers of the Syriac East together.

Writings

Read his works

1 of 1 work
  • 7th c.

    Mystic Treatises

    Six Treatises on the Behaviour of Excellence — opening homilies

    The opening homilies of Isaac's great corpus on the inner life — fear of God as the foundation of every virtue, the soul's stillness in the desert, the ladder of the Kingdom hidden within the heart. Verbatim public-domain English from A. J. Wensinck's 1923 translation, with more homilies to follow as the text is sourced.

    • Asceticism
    • Stillness
    • Repentance
    • Prayer

    Open work →

Holy St. Isaac the Syrian, pray to God for us.

Licensed Works

Books in print

These works are licensed and copyrighted by their publishers and cannot be hosted on Purify. As an Amazon Associate, Purify earns from qualifying purchases.

  • Cover of The Ascetical Homilies of Saint Isaac the Syrian

    The Ascetical Homilies of Saint Isaac the Syrian

    By Isaac the Syrian

    Holy Transfiguration Monastery · 2011

    The classic of the inner desert: homilies on stillness, tears, and the merciful heart that 'burns for all creation.' The standard English text from Holy Transfiguration Monastery.

    Buy on Amazon →

At a glance

Born
7th c. (Beth Qatraye)
Reposed
Late 7th c. (Mesopotamia)
See
Nineveh
Feast
January 28