Work dossier · summary and historical context
De Ratione Fidei is a pastoral and doctrinal treatise by Faustus of Riez, composed in Latin around 470–480 during his episcopacy. It addresses the nature of faith, grace, and free will in the context of semi-Pelagian debates following the Council of Orange (441). The work survives in a single manuscript tradition, with the earliest witness a 9th-century copy from Corbie (Paris, BnF lat. 12217). It was cited by Thomas Aquinas as a patristic authority on faith. No modern critical edition exists; the present text relies on the 1886 CSEL edition, which may conflate later glosses with original wording.
De Ratione Fidei is a key text for understanding late antique semi-Pelagian theology and the development of the doctrine of faith. It was cited by Thomas Aquinas in the Summa Theologiae as a patristic authority, indicating its lasting influence. The treatise also preserves early traditions about Mary’s perpetual virginity, linking it to apocryphal literature like the Protoevangelium of James.
Faustus of Riez (c. 405–490) was a bishop in southern Gaul and a leading figure in the semi-Pelagian controversy, which emphasized human free will alongside grace. De Ratione Fidei was composed ca. 470–480, likely in response to debates following the Council of Orange (441), which had condemned Pelagianism but left room for semi-Pelagian views. The treatise is written in a clear, non-speculative style typical of Faustus’s milieu. It survives in a single manuscript tradition; the earliest witness is a 9th-century copy from the library of Corbie (now Paris, BnF lat. 12217). A 10th-century manuscript (Vat. lat. 3848) contains variant readings that may affect doctrinal terms. The 1886 CSEL edition, lacking a full stemma, may conflate later glosses with original wording. No modern critical edition exists.
Apparatus · what the pipeline recorded
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