On Pope St. Leo’s View of the Nestorian Heresy

saint_leo3Pope St. Leo the Great ca. 400-461

Let there, however, remain in force what was decreed specifically against Nestorius at the earlier council of Ephesus, at which Cyril of holy memory then presided, lest the impiety then condemned should derive any comfort from the fact that Eutyches is being struck down by condign execration. For the purity of faith and teaching, which we proclaim in the same spirit as did our Holy Fathers, condemns and prosecutes equally both the Nestorian and the Eutychian depravity together with their originators. Fare well in the Lord, most dear brethren. (Epistle 93, To the Council of Chalcedon)