In this conversation, Dave and Brandi Johnston delve into the connections between the Old and New Testaments in Christian theology. They discuss the significance of Jeremiah 31 and its connection to the New Testament, and explore the beauty and foreshadowing of redemption. They also examine the role of the Holy Spirit in the narrative of Acts and the importance of devoting oneself to the teachings of Christ and the apostles. Additionally, they discuss the early Christian church's identity and resilience in the face of persecution, the origins and evolution of the term 'Christian,' and the impact of Jesus' resurrection on the community.