The book is a translation of the author's doctoral dissertation defended at the Faculty of Theology at Oxford University. The teachings of the great theologian and mystic of the 11th century are considered in the context of the entire diversity of the Tradition of the Eastern Church. The author explores the relationship between crepes. Simeon to the Holy Scriptures and Orthodox worship, to the studio monastic tradition, to hagiographical, theological, ascetic and mystical literature. The personality and teaching of Simeon the Studite, the spiritual father of St. Simeon the New Theologian. The relationship between the personal spiritual experience of a Christian and the Tradition of the Church is the main theme of the book. The Appendices contain new translations of the works of Simeon the New Theologian.