The book combines articles by an outstanding theologian and patrolologist of the 20th century. Archbishop of the Russian Orthodox Church in Belgium Vasily (Krivoshein) (1900-1985). The features of the publication include bibliographic and substantive comments that allow the reader to better understand the history of theological problems to which the published articles are devoted, the content of the terms and concepts used, as well as the church-historical context of the creation of these works. The uniqueness of the book is also due to the fact that it contains For the first time, historical and biographical sketches of the life of Bishop Vasily are published. The essays present for the first time unique materials from his personal archive, preserved in the Brussels diocese and in the possession of Bishop Nikita Igorevich Krivoshein’s nephew. The book contains an annotated name index. The index is a unique biographical reference book on the history of theological thought and personalities associated with it, as well as on the history of Orthodoxy and other Christian denominations in the 20th century. The book is intended for the general Orthodox community, students of theological educational institutions, everyone interested in the history of the Church and theological thought, history of Russian emigration, as well as interfaith relations and polemics.