How Chalcedon Answered Both Nestorius and Eutyches
Ordained Minister, M.Div.
June 6, 2026
2 min read
One of the most remarkable things about the Chalcedonian Definition is that it answered two opposite errors simultaneously. Nestorius and Eutyches had each overcorrected against the other, and both landed outside the bounds of Christian orthodoxy. Chalcedon threaded a narrow path between them.
The Nestorian Error
Nestorius, Patriarch of Constantinople, objected to calling Mary 'Theotokos'—God-bearer. He preferred 'Christotokos'—Christ-bearer. His concern was to protect the distinction between Christ's two natures. But Cyril of Alexandria argued that Nestorius' position actually divided Christ into two persons, making the union of divinity and humanity merely a moral or relational connection rather than a genuine personal unity. Cyril won at Ephesus in 431.
The Eutychean Error
Eutyches, an elderly Alexandrian monk, swung so far toward Christ's personal unity that he denied the distinctness of the two natures. He taught that Christ's humanity was absorbed into divinity like a drop of water disappearing into the ocean. After the Incarnation, Christ had only one nature. This view, called Monophysitism, was condemned at Chalcedon in 451 and remains the position that separates the Oriental Orthodox churches from the rest of Christianity.
Chalcedon's Answer
Against Nestorius: one person, not two. Against Eutyches: two natures, not one. The definition holds both realities together in productive tension, excluding both errors without collapsing the mystery. This is the theological work that genuine orthodoxy always requires: not picking one half of a paradox, but holding both with precision and humility.
