Letter 18: Leo, bishop of the city of Rome, to Januarius, bishop of Aquileia. Those who renounce heresy and schism and return to the Church must make their recantation very clear: those who are clerics may retain their rank but not be promoted. On reading your letter, brother, we recognized the vigour of your faith, which we already were aware of, and cong...

Pope Leo the GreatJanuarius|c. 442 AD|leo great
illness
Theological controversy; Travel & mobility; Military conflict

Leo, bishop of the city of Rome, to Januarius, bishop of Aquileia.

Those who renounce heresy and schism and return to the Church must make their recantation unmistakably clear. Clergy who return may retain their current rank but not be promoted.

On reading your letter, brother, we recognized the strength of your faith — which we already knew — and congratulate you on the watchful care you show as a pastor in guarding Christ's flock, so that wolves entering under the guise of sheep cannot tear the innocent apart in their savage fury, nor corrupt those who remain sound. To prevent such deception from succeeding, we think it right to warn you, beloved, and to remind you that it imperils anyone's soul to be received into Catholic communion from a sect of heretics and schismatics — stained as they are by the pollution of heretical communion — without proper and explicit satisfaction being required. It is entirely salutary and full of spiritual healing that presbyters, deacons, sub-deacons, or clergy of any rank who wish to appear reformed and ask to return to the Catholic Faith they had long ago abandoned should first confess without ambiguity that their errors and the very authors of those errors are condemned by them. This way their false opinions may be utterly destroyed, with no hope of recurrence, and no member of the Church may be harmed by contact with them — every point being addressed with its proper renunciation. Regarding these individuals, we also direct that the following canonical rule be observed: they should consider it a great act of mercy if they are allowed to remain undisturbed in their current rank, with no prospect of further promotion — but only on the condition that they have not undergone rebaptism. The Lord imposes no small penalty on anyone who judges a person tainted by such things fit for advancement to Holy Orders. If promotion is granted to those who are without fault only after thorough examination, how much more must it be denied to those who are under suspicion? Therefore, beloved brother, in whose devotion we rejoice, apply your attention to our directives and ensure the careful and prompt carrying out of these commendable and wholesome instructions, which affect the welfare of the whole Church. But do not doubt, beloved, that if what we have decreed for the observance of the canons and the integrity of the Faith is neglected — which we do not expect — we shall be greatly displeased. For the faults of the lower ranks must be laid at the door of none more than the slothful and careless leaders who often allow much disease to spread by refusing to apply the necessary remedy. Dated December 30, in the consulship of the illustrious Calepius and Ardaburis (447).

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

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