Monastic Life
The Eastern Orthodox synaxarion presents Psoi as a disciple of Saint Pachomius the Great, the founder of cenobitic monasticism, and places his ascetic labours in the desert of Sketis during the fourth century. After settling in the Nitrian desert near the cell of Saint Macarius the Great, he drew visitors from various places who came seeking his instruction.
The parallel Coptic tradition, which venerates the same desert father, records additional details of his early formation and extreme asceticism and names a different teacher; the Eastern Orthodox account followed here names Pachomius the Great.