Watchman Nee emphasizes the distinction between the work of apostles and the local churches, asserting that the apostolic ministry is foundational to the establishment of churches, but the two should not interfere with each other. He explains that while apostles are responsible for the work of spreading the gospel and founding churches, local churches are to be managed by elders who oversee the spiritual needs of their community. Nee warns against the confusion that arises when the responsibilities of the church and the work are mixed, leading to sectarianism and a loss of the local character of the church. He stresses that the ultimate goal of all apostolic work is to build up local churches, not to create separate entities or organizations. The sermon calls for clarity in understanding one's role, whether as an elder or an apostle, to ensure the health and growth of the church.