This sermon examines the apostolic model of the church presented in Acts 2:42-47, contrasting it with the hierarchical structures of the Roman Catholic Church during the Reformation. By referencing the Belgian Confession, the text outlines the marks of the true church, including the pure preaching of the gospel, the proper administration of sacraments, and the practice of church discipline. The central message emphasizes that the early church was characterized by a four-fold devotion to doctrine, fellowship, the breaking of bread, and prayer, which created a community of joy, generosity, and mutual support. This lifestyle of radical hospitality and shared life served as a powerful witness to the surrounding culture, resulting in the daily addition of new believers. The sermon concludes by urging believers to identify with this biblical standard, recognizing that they are the body of Christ rather than merely attending a religious institution.