Teaching and Hesychasm
Gregory is remembered as a leading exponent of hesychasm, the practice of inner watchfulness and unceasing invocation of the name of Jesus. Having received the discipline at Sinai and refined it on Crete under the monk Arsenios, he taught the prayer of the heart to a wide circle of disciples and helped establish it as a major current of Byzantine spiritual life.
Together with his contemporary Gregory Palamas, he is credited with helping make Mount Athos a center of the hesychast revival. His emphasis on stillness, attentiveness, and the continual prayer of Jesus shaped the contemplative traditions that spread from Athos and Paroria across the Orthodox world.
Disciples and Legacy
Gregory's influence extended well beyond his own lifetime through his disciples, who carried hesychast spirituality into the Hellenic and Slavic worlds. Among them were Patriarch Kallistos I of Constantinople, Nicodemus of Tismana, and Theodosius of Tarnovo, who founded the Kilifarevo monastery near the Bulgarian capital.
The monastery at Paroria became, by the fourteenth century, second only to Mount Athos as a center for the practice and dissemination of hesychasm, drawing clerics from Bulgaria, Byzantium, and Serbia. After persistent raids the community was eventually abandoned, and today only ruins of the site remain.
Writings
Five of Gregory's works were later included in the Philokalia, the anthology of texts on prayer and the ascetic life. They treat the commandments and doctrines, the signs of grace, stillness, and the practice of prayer, and stand among the foundational texts of the hesychast tradition. He is also credited with the composition of hymns, including canons to the Holy Trinity and the Holy Cross.