One Person in Two Natures

Chalcedon's four qualifications protect the account of union: without confusion, change, division, or separation. Each rules out a way of losing what Christian faith confesses about Christ.

Confusion or change would make divinity and humanity into something other than what they are. Division or separation would fail to confess the one Christ. The formula preserves complete humanity and complete divinity together in the same person.

That is why a demigod comparison can mislead so quickly. The common idea of a partly divine offspring has already changed the terms before the historical comparison begins.

The theological difference should therefore guide every later resemblance. We can study how the ancient imagination received a claim of divine-human proximity. We must keep clear what the Christian claim actually is: the eternal Son assuming human nature, rather than a hero occupying a middle position between humanity and God.