John Nelson Darby discusses the structure of the Book of Revelation, dividing it into three main parts: the personal glory of Christ, His judgment of the seven churches, and events following the church's removal. He emphasizes the continuity of responsibility from the early church to the present, highlighting the significance of the throne in heaven and the roles of cherubim and seraphim in God's governance. Darby also explores the implications of the judgments and the nature of the everlasting gospel, asserting that the church's current state reflects a departure from its original calling. He concludes with a focus on the ultimate triumph of Christ and the establishment of His kingdom.