The Council of Chalcedon established boundaries for understanding the person of Christ, affirming that he is truly God and truly man without mixture, confusion, separation, or division. The council rejected the Monophysite heresy, which confused the divine and human natures of Christ, and the Nestorian heresy, which separated them. The four negatives of the council emphasize the perfect unity between the divine and human natures, and each nature retains its own attributes in the incarnation.
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