Tertullian on the Trinity

Tertullian is often portrayed as a prescient figure who accurately anticipated the Nicene consensus about the Trinity. But when he is examined against the background of his immediate predecessors, he falls into place as a typical second-century Logos theologian. He drew especially from Theophilus of Antioch, Justin Martyr, and Irenaeus of Lyons. At the same time, Tertullian did introduce some important innovations. His trinitarian language of ‘substance’ and ‘person’, rooted in Stoic metaphysics, offered the church a new way to be monotheistic while retaining the full deity and consubstantiality of the Word. Tertullian also significantly developed the concept of a divine oikonomia, God’s plan to create and redeem the world. The Son and Spirit are emissaries of the Father’s will—not ontologically inferior to him, yet ranked lower in the way that the sent are always subordinate to the sender. For this reason, Tertullian denied that a Father/Son relationship was eternal within the Trinity, seeing it rather as a new development emerging from God’s plan to make the world. Such temporal paternity and filiation distances Tertullian from the eventual Nicene consensus, which accepted instead the eternal generation theory of Origen. While Tertullian did propose some important terms that would gain traction among the Nicene fathers, he was also marked by a subordinationist tendency that had affinities with Arianism. Tertullian’s most accurate anticipation of Nicaea was his insistence on three co-eternal and consubstantial Persons. Historical theologians need to start admitting that Tertullian was a far cry from being fully Nicene. Rather, he offered a clever but still imperfect half-step toward what would become official orthodoxy..