Symeon the New Theologian: The Theological and Practical Treatises and the Three Theological Discourses: Cistercian Studies, cartea 41

Transforming evagrian hesychia, with its insistence on absolute solitude, Symeon lived as the spiritual father of a bustling monastery in the very heart of Constantinople. Yet his works became, two centuries after his death, perhaps the most important inspiration for Athonite heyschasm.