The book is a short guide to the Orthodox faith, written in a lively, accessible, modern language. The first section of the book is devoted to the basic doctrinal truths of the Orthodox Church: it deals with faith, God, Jesus Christ, the Holy Spirit, the Church, baptism, and the resurrection of the dead. The second section, devoted to moral topics, speaks of the Ten Commandments of the Old Testament, the Beatitudes, love of God and love of neighbor, sin and repentance, questions of family ethics, the upbringing of children, and the place of women in the Church. The third section deals with prayer and worship, the temple and icons, the church calendar and church holidays, the Sacraments, and rituals. The book can be used for both pre-baptismal and post-baptismal catechesis. It will be of interest to everyone anyone who wants to systematize their knowledge about the Orthodox Church. Originally published in Russian, the book addresses the fundamentals of the Orthodox faith in a way that is understandable and approachable for all.