Sunday, August 4, 2019. 7 Letters (Part 4). Deuteronomy 26:16-19 & Revelation 2:18-29. Pastor Bryant Anderson preaching. The Christian church at Thyatira has a pretty big problem. On the face of it, it looks like their problem is an inability to keep certain sinful practices outside the four walls of the church. In reality, however, the problem is much more complex, and it’s something that still challenges the church today.