Complex sentence: Although Honorius never issued a dogmatic decree in regards to the controversy of Christ's wills, he favoured Monothelitism; a formula proposed by the Byzantine emperor Heraclius, with the design of bringing about a reconciliation between the Monophysite with the rest of the Catholic Church.
Split into simpler sentences: Although Honorius never issued a dogmatic decree in regards to the controversy of Christ's wills, he favoured Monothelitism. He supported a formula proposed by the Byzantine Emperor Heraclius with the design of bringing about a reconciliation between Monothelites and the rest of the Catholic Church.