What is one of the key teachings of Tertullian?

Tertullian is known for his significant contributions to early Christian theology, particularly in his formulation of the doctrine of the Trinity. His understanding of the economic Trinity emphasizes the distinct roles of the Father, Son, and Holy Spirit in the work of redemption and creation. This concept helps clarify how the three persons of the Godhead interact with humanity and with each other, focusing on their different functions in the unfolding of God's plan.

This perspective has influenced later theological discussions and is foundational for understanding how Christians perceive the relationship and unity within the Trinity. Tertullian's articulation provided a framework that helped to defend the faith against heretical views and contributed to the establishment of orthodox Christian beliefs.

While asceticism, universalism, and subordinationism are topics of discussion in early church writings, they do not capture Tertullian's primary contributions or innovations in the same way that his teachings on the economic Trinity do. His emphasis on this doctrine reflects his efforts to articulate a coherent understanding of God that aligns with the experiences and teachings of the church during his time.