In this text, Archimandrite Zacharias presents the teaching of Archimandrite Sophrony (Sakharov), setting out the basic themes of his theology. Archimandrite Zacharias expands from his doctoral thesis, The Actualization of the Hypostatic Principle in the Theology of Archimandrite Sophrony—submitted at the Faculty of Theology of the University of Thessalonica in 1998.