Justinian likewise would have a keen remembrance of the degradation from which his uncle had restored the empire. None knew better than he how the ignoble reigns of the usurper Basiliscus, of Zeno, and of Anastasius, by perpetual tampering with heresy and ruthless persecution of the orthodox, had well-nigh broken that empire to pieces. Had he not thrown all his energy, as the leading spirit of his uncle's realm, into that great submission to Pope Hormisdas which rendered its beginning illustrious?
Nevertheless a dark blot lies upon the name and memory of Justinian. He was not only successor of the great Theodosius in his ardent zeal for the Church's doctrine and unity, but likewise of Constantine, when he sullied his greatness and risked all the success of his former life by falling into the hands of the Nicomedian Eusebius.
The vast event by which the Christian Church had become a ruling power in the commonwealth had affected from that time forth the whole being of Church and State. Christian emperors had come to see in bishops the Fathers and Princes of such a Church, consecrated by God to that office, not appointed by men.[170] As such they had honoured them, committed to their wisdom and guidance the salvation of their own souls, and the weal itself of the commonwealth; not hindered them in the performance of their duties, not hampered them by restrictive laws. Rather they had protected them by external force from hindrance when invited thus to show their protection as heads of the State. Circumstances led them on to a more immediate entrance into the Church's special domain, and the things which happened in that domain led to this their entrance. It kept even pace with the developments and disturbances caused by heresy therein.
Christ had committed to the whole episcopate, under the guidance of the Holy Spirit, the task of spreading the seed of Christian doctrine over the earth, of watching its growth, of eradicating the false seed sown in night-time by the enemy. In proportion as the empire's head took part in this work, his influence on the episcopate could not but increase. If his participation was confined within its due limits, if the temporal ruler hedged the Church round from irruption of external power, if he rooted the tares out of her field only to clear her enclosure, his relation to the bishops remained merely external. But if he went on himself to lay down the limit of the Church's domain, or even if he only took an active part in such limitation; if he made himself the judge what was wheat and what was tares, in so doing he had won an influence on the bishops which did not belong to him. Then Church and State ran a danger of seeing their respective limits confused. Thus the relation of the bishops to the ruler of the State became then, and remains always, an unfailing standard of the Church's freedom and independence.