James Cassidy, a Reformed theologian and instructor, delves into profound ecclesiastical concepts in this insightful discussion. He distinguishes between the Church Militant, engaged in spiritual warfare, and the Church Triumphant, celebrating ultimate victory. Cassidy contrasts the church as both an organization and an organism, advocating for a balanced view. He addresses the challenges of ecumenicity, emphasizing the need for doctrinal unity. Finally, he defines the holiness of the Church, stressing the importance of assessing a church's purity through its doctrine and worship practices.