Like the historical period of the Dark Ages, idolatry mingled with Christian works and worship, the papacy elevated itself to power, and rituals took priority over personal faith in Jesus Christ. Jesus wants all churches to know that He sees beyond appearances right into every motive, feelings, and purpose. When He searches “the minds and the hearts” (2:23), He discerns our entire beings and will reward or judge according to what we deserve. To the rest in Thyatira, those who didn’t get sucked into Satan’s schemes to worship a parody of the Gospel, Jesus promised no other heavy burden. He knows our hearts and knows what we can stand. Revelation 2:24-25 ESV [24] But to the rest of you in Thyatira, who do not hold this teaching, who have not learned what some call the deep things of Satan, to you I say, I do not lay on you any other burden. [25] Only hold fast what you have until I come. https://bible.com/bible/59/rev.2.24-25.ESV