“[Honorius] did not extinguish the flame of the heretical doctrine in its rise, as it became the apostolical authority, but fomented it by negligence.” Pope Leo St. II, 1st Epistle to the Bishops of Spain  (Fr. Alban Butler, “Lives of the Saints”, Feast of Pope St. Leo II, footnote cites “Conc. t. 6, p. 1817.”)