St. Martin I
Pope Saint Martin I was elected Pope in 649. During his papacy, Martin I worked towards condemning the heresy of monothelitism: the view that Jesus Christ has two natures but only one will. This was contrary to the teachings that Jesus has two wills, human and divine, corresponding to his two natures. Pope Martin I convened the Lateran Council of 649 that ultimately condemned monothelitism. After the council, the emperor, who believed in monothelitism, had Martin arrested. He spent the rest of his life in a lonely exile, forced to suffer by the emperor because of his defense of Truth.