VI. He asks Theodoret for his continued cooperation, and refers him to a letter which he has written to the bishop of Antioch.
It remains that we exhort you to continue your co-operation with the Apostolic See, because we have learned that some remnants of the Eutychian and Nestorian error still linger among you. For the victory which Christ our Lord has vouchsafed to His Church, although it increases our confidence, does not yet entirely destroy our anxiety, nor is it granted us to sleep but to work on more calmly. Hence it is we wish to be assisted in this too by your watchful care, that you hasten to inform the Apostolic See by your periodic reports what progress the Lord's teaching makes in those regions; to the end that we may assist the priests of that district in whatever way experience suggests.
On those matters which were mooted in the often-quoted council, in unlawful opposition to the venerable canons of Nicæa, we have written to our brother and fellow bishop, the occupant of the See of Antioch, adding that too which you had given us verbal information about by your delegates with reference to the unscrupulousness of certain monks, and laying down strict injunctions that no one, be he monk or layman, that boasts himself of some knowledge, should presume to preach except the Lord's priests. That letter, however, we wish to reach all men's knowledge for the benefit of the universal Church through our aforesaid brother and fellow bishop Maximus; and for that reason we have not thought fit to add a copy of it to this; because we have no doubt of the due carrying out of our injunctions to our aforesaid brother and fellow bishop. (In another hand.) God keep you safe, beloved brother. Dated 11 June in the consulship of the illustrious Opilio (453).
Source: Letters (New Advent)