Saint Gregory was a native of Constantinople, and pursued an ascetic life on Mt. Athos in the Lavra of St Athanasius (July 5). He was the spiritual guide of St Gregory Palamas (November 14).
You reflected the angelic life, And your soul was a vessel of insight. O holy Father Gregory, radiant torch of virtues, The glory of Sinai and Athos and enlightener of the Slavic lands, Guide us unerringly, that our souls may be saved!