The Book of The Revelation of Jesus Christ Lessons from the Seven Churches

Lesson 1: Insights into how the apostles, prophets, etc worked with the Lord Jesus Christ
Lesson 2: Christ as the King of Kings
Lesson 3: There was a strong emphasis on temples and the role they played in religion.
Lesson 4: Erroneous teaching of the Nicolaitans (do whatever you want with the body - it’s the spirit that matters)
Lesson 5: we wrestle not against flesh and blood
Lesson 6: Christians were encouraged not to fear persecution in their regions
Lesson 7: Some things that the churches experienced were universal
Lesson 9: Christianity is for everyone. Some people thought Christianity, like other religions was a subset cult/secret society which was part of a larger religion, e.g. Judaism
Lesson 10: The key challenges faced by the seven churches included Syncretism, Dualism, Polytheism, Nicolaitanism, Political Polarization, Understanding the intersection between faith and culture, Understanding the intersection between faith and wealth, Heretical doctrines (such as Gnosticism, Docetism, Monophysitism, Adoptionism, Nestorianism, Arianism, etc)
Lesson 11: Our help is in God & Christianity taught a message of love for God and for one another
Lesson 12: God’s power is infinitely superior