The African theologian

Tertullian is the son of a Roman centurion, trained as a lawyer in the sharp rhetorical tradition of the Roman courts, a man with a mind like a blade and a temper to match. He converts to Christianity in his late thirties, and the conversion does not soften him. It redirects him.

Carthage in the late second century is a sophisticated city — the third most important in the empire, a center of Latin culture and legal training. When Tertullian begins writing as a Christian, he does something no one has done before: he writes Christian theology in polished Latin. Before him, almost all Christian writing is in Greek. He essentially creates the vocabulary of Western Christian theology — words like Trinity, sacrament, satisfaction — by coining Latin terms for Greek concepts.

He is the first person to use the word trinitas. He is the first to articulate clearly that God is three persons in one substance. He writes this not in a calm academic treatise but in the middle of polemical battles on multiple fronts simultaneously — against the Gnostics, against Marcion, against the pagan accusers of the church.

He is also, from the beginning, impossible to manage. He has no patience for compromise or half-measures. His portraits of lapsed Christians — those who recant under persecution and then want to return — are devastating. His portraits of clergy who accommodate to wealth and comfort are withering.

Eventually he finds even the mainstream church too soft and joins the Montanists — a stricter prophetic movement that emphasized rigorous discipline and continued direct revelation. He spends his last years writing bitter tracts against his former community.

The brilliance and the difficulty were always the same thing.

Tertullian's famous question — what has Athens to do with Jerusalem — is often read as anti-intellectual, as if he were rejecting philosophy entirely. He wasn't. He was a highly trained philosopher himself.

He was asking a more precise question: at what point does the church's engagement with the surrounding culture become accommodation to it? At what point does the desire to be intellectually respectable produce a faith that has been sanded down to fit the philosophical assumptions of its age?

It is a question every generation of the church has to answer for itself. Too much Athens and the gospel disappears into the ambient culture. Too little and the church becomes a sealed room that cannot speak to the world outside it.

Where is the line? Tertullian never fully resolved it. Neither has anyone since. But the question is still the right one.