The speaker is usually a baptized brother (elder or ministerial servant) who travels between congregations. He isn’t writing a sermon from scratch. He is following a provided by the "Faithful and Discreet Slave" (the Governing Body).
Many religious studies departments at universities (Internet Archive, Archive.org) have uploaded "abandoned" lists (pre-1990). Search for: "Public Talk Outlines" 1986 Watchtower. list of jw public talk outlines
When examining a , you will notice a consistent pattern in how they are formatted. Understanding this structure helps one appreciate the logic behind the discourse. The speaker is usually a baptized brother (elder
For a researcher, the list is a data set. By tracking how often topics like "the Great Tribulation" or "loyalty to the organization" appear, you can map shifting doctrinal priorities. you can map shifting doctrinal priorities.