Cyrus' chief opponents, St. Sophronius, died in 638 (Epistola synodica, Mansi, XI, 480), and St. Maximus, died in 662 (Epistola ad Nicandrum; disputatio cum Pyrrho, P.G., XCI, 101, 345), reproached him for falsifying the then much-respected text of Dionysius and substituting for (new). They showed, moreover, the inanity of his claim to the support of the Fathers, and explained how the Divine and human natures of Christ, sometimes styled one, because they belong to the same person and work in perfect harmony, can no more by physically identified than the natures from which they proceed. Historians are not agreed as to how Cyrus came by this.