Resources

Structure

A single, carefully crafted definition built on four negative clauses — without confusion, without change, without division, without separation — and corresponding positive affirmations about Christ's two natures united in one person. It builds directly on the Nicene Creed's Trinitarian foundation.

Purpose

Adopted at the Fourth Ecumenical Council (451 AD) to refute Nestorianism (which divided Christ into two persons) and Eutychianism (which merged his two natures into one). It established the permanent orthodox definition of Christ's person: fully divine and fully human in one undivided person.

Usage

Accepted as authoritative by Roman Catholic, Eastern Orthodox, and most Protestant churches as the binding definition of orthodox Christology. It is referenced in creeds, confessions, and theological education across traditions as the standard for sound teaching about Christ.

Influence

Established the permanent boundaries of Christological orthodoxy for all of Western and Eastern Christianity, directly shaping the Westminster Confession, the Augsburg Confession, and virtually every major creed and confession that followed over the next fifteen centuries.