In this lecture, I cover the many notes from the classic scholarly work from Jaroslav Pelikan, Emergence of the Catholic Tradition, vol. 1. Pelikan's history of the development of ideas is a standard work for historical theology and provides an excellent introduction to the first 6 centuries of the Christian Church, the major heresies, the Creed and Trinity, Nicaea and more! The second half is for paid subscribers to JaysAnalysis.