Pope from 625. He interested himself in the Christianization of the Anglo-Saxons, and he ended the schism of the patriarchs of Aquileia-Grado. However, his action in the Monothelite controversy was one of the arguments against Papal infallibility. About 634 Sergius, Patr. of Constantinople, wrote to him about the question of the ‘one energy’ of Christ. This formula, while confessing the two natures, attributed only one mode of activity—that of the Divine Word—to the Incarnate Christ. It had been found useful in reconciling the Monophysites, but was strenuously opposed by Sophronius of Jerusalem. Honorius sent Sergius a favourable reply, in which he used the unfortunate expression ‘one will’ in Christ. This formula was utilized in the ‘Ecthesis’, and Honorius himself was anathematized at the Third Council of Constantinople in 681.