Nor must it be forgotten that it was the constancy of the Popes in these sixty years which alone prevented the prevailing of Eutychean doctrine in the East. Blent with that doctrine was the attempt of three emperors to substitute themselves as judges of doctrine for the Apostolic See and the bishops in union with it. At the moment when John Talaia[113] was expelled from Alexandria, the Monophysite heresy, espoused by Acacius and imposed by Zeno, would have triumphed, save for the Popes Simplicius and Felix. And it would have triumphed while the instrument of its triumph, the Henotikon, would have inflicted a deadly blow upon the government of the Church by taking away the independence of her teaching office. This struggle continued during the reign of Zeno; and Anastasius, as soon as he became emperor, used all the absolute power which he possessed to enforce the reception of the same document. Even Euphemius and Macedonius were obliged to sign it, and the sacrifice which they made in suffering deposition does not deliver their character of bishops from the stain of this weakness. We see in this period the first stadium traversed by the Greek Church in that descending course which, in another century, brought it to the ruin wrought by Mahomet. On the other hand, the seven Popes kept the position of St. Leo--rather, they more than kept it, because, under outward circumstances so greatly altered for the worse, they both maintained his doctrine and justified his conduct. They insisted through the darkest times, under pressure of the greatest calamities, deprived of all temporal aid, that the person of Acacius should be solemnly removed from recognition as a bishop by the Church. They insisted, and it was done. The act of Acacius, if allowed to pass, would have carried into actual life the assertion of the canon which St. Leo had rejected: that the privileges of the Roman See were derived from the grant of the Fathers to Rome because it was the capital. The expunging of his name from the diptychs, with the solemn asseveration that the rank of the Holy See was derived from the gift of Christ, and that the Church's solidity as a fabric consisted in it, and equally the maintenance of the Catholic religion, established the contradictory of that 28th canon, and enforced for ever the subordination of the see which Acacius sought to exalt. At the same time it pointed out the distinction between the See of Peter and all other sees: the distinction that in the case of every other bishop the spiritual life of the bishop, as a ruler, is local and attached to his see. But the See of Peter is the generator of the episcopate, because of Peter ever living in his successor.