The monoenergist plan, suggested by Sergius, Patriarch of Constantinople, consisted of agreeing on the Chalcedonian principle that there were two natures of Christ, while practically nullifying it by saying he had only one energy, hèn thélema kaì mía enérgeia (ἓν θέλημα καὶ μία ἐνέργεια).[3] Cyrus supported this formula after being reassured by Sergius that it was endorsed by Pope Honorius I in Rome[4] and that it was opposed to neither the Fathers nor to Chalcedon and was destined to achieve great result. In return he was raised by Heraclius to the See of Alexandria in 630 in opposition to its Miaphysite Patriarch.