Letter 145

Theodoret of Cyrrhusassessor in case of monks|c. 440 AD|theodoret cyrrhus
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From: Theodoret, Bishop of Cyrrhus
To: The Monks of Constantinople
Date: ~449 AD
Context: A major apologetic letter in which Theodoret systematically refutes the charge of teaching "two sons" and provides an extensive defense of two-nature Christology, supported by citations from Scripture and the Fathers.

To the Monks of Constantinople,

There is nothing new or surprising in the fact that men who have sharpened their tongues against our God and Savior should also aim their arrows of falsehood at His faithful servants. The servants who grieve deeply at the outrage to their Master must expect to share in it. The Lord Himself forewarned His disciples: "If they have persecuted me, they will also persecute you. If they have called the master of the house Beelzebub, how much more the members of his household?" [John 15:20; Matthew 10:25]. Then He cheered them by pointing out how easily calumny is detected: "There is nothing covered that shall not be revealed, and nothing hidden that shall not be known" [Matthew 10:26].

I have often witnessed the truth of this divine prediction, but never more clearly than now. Those who authored the slander against me -- who purchased my destruction at great cost -- have been plainly exposed as sharing the heresy of Valentinus and Bardesanes [early Gnostic heretics who denied Christ's true humanity]. They had hoped to conceal their own error by sharpening their tongues on falsehood and wounding me. But ever since I saw that the long-extinguished heresy was being revived, I have never stopped crying out -- bearing witness in private and public, in social gatherings and in the churches of God -- striving to refute their conspiracy against the faith. For this they have poured their insults on my head, alleging that I preach "two sons."

But they should have confronted me to my face, not slandered me behind my back. Instead, they did the opposite: they confined me to Cyrrhus by imperial decree, compelled the "righteous judges" to condemn me without a trial, and delivered sentence against a man thirty-five days' journey away. No criminal charged with witchcraft, grave-robbing, murder, or adultery has ever been treated this way.

But I will leave the judges alone for now. The Lord is at hand, "who judges the world with righteousness and the peoples with His truth" [Psalm 96:13], who demands an account not only of words and deeds but even of thoughts. Let me refute the false charge.

What proof do they have that I teach two sons? Had I been a silent man, there might be some ground for suspicion. But my life's work has been to defend apostolic doctrine and bring the nourishment of instruction to the Lord's flocks. I have written thirty-five books interpreting Scripture and refuting heresies. The falsehoods they have fabricated are therefore easy to disprove. Tens of thousands of hearers testify that I have taught the truth of Gospel doctrine, and my writings are available for anyone who wishes to examine them.

Not one of them proclaims two sons. I preach one Only-begotten, the eternal Son of the Father, who in the last days became man for our salvation. I do not divide the one Lord Jesus Christ into two. I recognize one Son, both before and after the incarnation. But I maintain the distinction between divine nature and human nature, for the flesh is not of the same substance as the Godhead, and the Godhead did not change into flesh. God the Word did not begin to exist -- He exists eternally with the Father. He was not formed in a virgin's womb -- He who forms all creation shaped for Himself a temple within her. He was not created -- He is the Creator of all things. Instead, "being in the form of God, He took the form of a servant" [Philippians 2:6-7] and "shared in flesh and blood" [Hebrews 2:14], and took on "the seed of Abraham" [Hebrews 2:16].

Even after taking human nature, He remains what He was -- the Only-begotten Son of God, God the Word, Lord, Almighty. But He is also called "Jesus" and "Christ" according to His humanity. We do not divide the titles between two persons. We recognize one Son who is both God and man. But we maintain the properties of each nature: the Godhead is impassible, immutable, and infinite; the humanity is passible, mortal (before the resurrection), and limited.

This is not my private invention. This is what we received from the prophets, the apostles, and the Fathers. I could cite passage after passage from Athanasius, Basil, Gregory of Nazianzus, Gregory of Nyssa, Flavian of Antioch, John Chrysostom, Ambrose, and many others -- all teaching the same distinction of natures within the one Christ.

Those who now teach that the Godhead and the flesh are of one nature are reviving the very heresy that was condemned long ago. For if the Godhead suffered, then Christ's human nature was unnecessary. And if the divine nature changed into flesh, then it is no longer divine -- and we worship something that has ceased to be God. Both conclusions are blasphemous.

I confess one Lord Jesus Christ, the Only-begotten Son of God, who became man without ceasing to be God. In Him I recognize both the impassibility of the divine nature and the suffering of the human nature. It was not the Godhead that was nailed to the cross but the body; it was not the eternal nature that died but the mortal nature He assumed. And through the death of His flesh, He conquered death for us all.

I beg your holinesses to pray for me, and to trust that whatever the slanderers say, my teaching follows the apostolic path. The Lord who sees all things is my witness.

Modern English rendering for readability. See the 19th-century translation or original Latin/Greek for scholarly use.

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