[There is indeed a passage in one of Gregory's Epistles (II. 52) which has been taken to imply a claim to jurisdiction over them. (See note on passage in Migne's Patrologia.) Natalis, bishop of Salona, had disregarded the admonitions of two successive bishops of Rome; and Gregory writes to him, "Quod si quilibet ex quatuor patriarchis fecisset, sine gravissimo scandalo tanta contumacia transire nullo modo potuisset." But the intended meaning may be, not that such contumacy towards Rome would have been scandalous even in one of the great Eastern patriarchs, but that it could not have been passed over by them if shewn towards themselves in their own patriarchates. The words, it is true, suggest the former meaning, but the latter seems more likely to have been intended.]
On the other hand, towards the patriarch of Constantinople, when he considered him guilty of uncanonical procedure, he assumed a distinctly authoritative attitude. On his own authority he declared null and void (as his predecessor Pelagius II. had done) the synod at which the title of oecumenical bishop had been conferred on the Constantinopolitan patriarch (Lib. V., Epp. 18, 21); he entertained the appeal to himself of the two presbyters John and Athanasius, reversed their condemnation by the patriarch of Constantinople, and ordered their restitution (Lib. VI., Epp. 14, 15, 16, 17, &c.); and in a letter to John of Syracuse he says, "Nam de Constantinopolitana ecclesia quod dicunt, quis eam dubitet sedi apostolicæ esse subjectam?" (Lib. IX., Ep. 12.) For the See of Constantinople, though now patriarchal, was not even an ancient sedes apostolica: its bishop had indeed been assigned honorary rank (ta presbeia tes times) next after the bishop of Rome by the general Council of Constantinople (a.d. 381), but this only on the political ground of Constantinople being new Rome: patriarchal jurisdiction had indeed been confirmed to it over the Metropolitans of the Pontic, Arian, and Thracian dioceses by the 28th Canon of the Council of Chalcedon (a.d. 451); but this Canon had been repudiated at the time by Pope Leo of Rome. Hence the popes were ever peculiarly jealous of any new assumption, or uncanonical proceedings, on the part of the Constantinopolitan See, the ascendancy of which signified to them imperial domination rather than primitive ecclesiastical order or prerogative: and hence it is not to be wondered at that on the assumption of a title that seemed to imply universal supremacy Gregory was at once in arms, and asserted strongly all the authority that he believed to be inherent in his own Apostolic See. Such assertion, however, had no immediate effect in the absence of power to enforce it: it was disregarded at Constantinople: the Emperor Mauricius, who alone could have given practical effect to it, was appealed to by Gregory in vain; and, though Phocas, who succeeded him, is said to have issued a decree that "the Apostolic See of St. Peter, that is the Roman Church, should be the head of all Churches" (Anastasius Bibliothec.), yet it is an historical fact that neither Constantinople nor the Churches of the East generally, ever submitted to the claims of the Roman See.
There is no record of the year of Pope Gregory's birth: It was probably about a.d. 540, some ten years after Benedict of Nursia had founded the Benedictine order. He was well born, his father Gordianus being a wealthy Roman of senatorial rank, bearing the title of "Regionarius," which denoted some office of dignity. He received the education usual with young Romans of his rank in life, and is said to have been an apt scholar. The historian Gregory of Tours, who was his contemporary, states that in grammar, rhetoric, and logic he was considered second to none in Rome; and he also studied law. Such education, however, fell somewhat short of what we should now call a liberal one, leaving him, as it did, entirely unacquainted. with any language but his own, and so a stranger to all Greek literature; with no apparent taste, that he anywhere displays in his writings, for art, poetry, or philosophy; and with scanty historical knowledge. He was, with regard to intellectual equipment, an educated Roman gentleman of his day, and no more; regarding the Roman nation as paramount in the world, and not aspiring beyond the studies thought sufficient for Roman citizens of rank, at a time when study of Greek literature and scientific culture had died out at Rome. In later life also, when he had time to devote himself to study and contemplation, he confined himself, with a purely devotional purpose, to Holy Scripture, in which (though of course only in the Latin version) he was thoroughly versed, or to the orthodox Latin Fathers, St. Augustine being his favourite. His condemnation of the study of classical heathen literature by Christians, appears strikingly in his letter to Desiderius (Lib. XI., Ep. 54). Still his early education, though thus limited, fitted him well for dealing with practical matters, for grasping the bearings of subjects that came before him, and for expressing himself clearly and often forcibly thereon; though his style is not free from the artificiality that was probably encouraged by the rhetorical training of his day. He was intended for, and at first pursued, secular occupations suitable to his rank in life; and at an unusually early age (certainly before 573, when he would be little more than 30 years of age) he was appointed by the Emperor Justin II. to the dignified office of Prætor Urbanus. In this early period he does not appear to have been distinguished by any peculiar saintliness of practice or demeanour. He dressed, at any rate, conformably to his rank: for Gregory of Tours speaks of the striking contrast of the monastic garb which he afterwards assumed with the silk attire, the sparkling gems, and the purple-striped trabea, with which he had formerly paced the streets of Rome. But, on the other hand, there is not the least reason to suppose that he had ever been loose or irreligious.
He had been religiously brought up. His father Gordianus is said to have been himself a religious man: his mother Silvia (who lived in ascetic seclusion after her husband's death), and the sisters of Gordianus, Tarsilla and Æmiliana (who lived in their own house as dedicated virgins), have obtained a place in the calendar of saints: and his biographer, John the Deacon, speaks of his early training having been that of a saint among saints. He never, in his own writings, alludes to any crisis in his early life at which he had become convinced of sin, saying rather (as in one of his letters) that, while living in the world, he had tried to live to God also, but had found it hard. But on the death of his father (the date of which is not known) his religious aspirations took a decided form; he kept but a small part of the patrimony that came to him, employing the rest in charitable uses, and especially in founding monasteries, of which he endowed six in Sicily, and one, dedicated to St. Andrew, on the site of his own house near the Church of St. John and St. Paul on the Cælian, "ad clivum Scauri" which he himself entered as a monk, and of which he was eventually elected abbot. The religious views of his age, in which he fully shared, would of necessity suggest to him the monastic life as the highest form of saintliness; and he may have been especially moved by the recent example of St. Benedict of Nursia, whom he greatly admired, and of whom he has left us in his Dialogues many interesting records. In the ardour of his devotion, his life in the monastery appears to have been ascetic to an extreme degree. He is said by his biographer to have been fed on raw vegetables (crudo legumine), supplied to him by his mother, who had become a recluse in a neighbouring cell; and his fasts made him continually ill, and endangered his life. He tells us himself in his Dialogues of one Holy Week towards the end of which he fainted from exhaustion, and was hardly kept alive: but before losing consciousness, being shocked at the idea of breaking his fast before Easter Day, he had requested the prayers of a very holy monk called Eleutherius; and the result was that, returning to consciousness, he remembered nothing of his previous pangs, felt no longer any craving for food, and could have continued his fast a day longer than was required. (Dialog., Lib. iii. c. 33.) Such was the idea then entertained, and by him shared, of the way of attaining to the highest holiness. However he survived all, though the very weak health of which in his subsequent life he continually complains may have been due in part to such extreme self-discipline. Nor did he, it is said, relax his habits of study and prayer in consequence of the debility induced by his asceticism. It seems not to have precluded even energetic action of a practical kind. For it was at this period of his life that, according to John the Deacon his biographer, the well-known incident occurred of his seeing the English youths in the Roman slave-market, and obtaining the leave of pope Benedict I. to undertake a missionary enterprise for the conversion of the Angli, on an expedition for which purpose he had already set forth when the pope, moved by the remonstrances of the Roman people, recalled him to Rome.
Having thus become a devout monk, he remained one in heart throughout his life. His habits of life were, as far as they could be, still monastic while he sat upon the papal chair; and he never lost, and often gave expression to, his ardent longing for a return to monastic seclusion, as alone allowing closeness to God, as well as peace and happiness. See, for instance, what he says on this subject soon after his accession to the Emperor's sister Theoctista (Epp., Lib. I., Ep. 5), or, after longer experience, to his old friend Leander of Seville (Lib. IX., Ep. 121).
But he was not allowed to enjoy for long the seclusion he so much desired; being summoned from his monastery by the pope to be ordained one of the seven deacons of Rome, and afterwards sent to Constantinople to be the pope's apocrisiarius (or responsalis) at the imperial court. There is some doubt as to which pope it was that thus ordained and commissioned him. From a combination of what is said by his biographers, Paul the Deacon and John the Deacon respectively, it seems most probable that it was Pope Benedict I. who summoned him from his monastery and ordained him, perhaps with the view of sending him to Constantinople, and that it was Pelagius II. (who succeeded Benedict a.d. 578) under whom he was actually sent. The office of apocrisiarius was usually filled by a deacon; and hence it is not unlikely that his employment in that office had been in view from the first, when he was called from his monastery and ordained. The popes at this time were in special need of an able representative at Constantinople for procuring, if possible, some effective aid against the Lombards, the Exarch at Ravenna having been appealed to in vain. Gregory remained at Constantinople for several years, probably from a.d. 578 to a.d. 585, first under the Emperor Tiberius, and then under Mauricius, who succeeded to the Empire a.d. 582. There is no extant record of instructions sent to him from Rome till a.d. 584, when Pope Pelagius wrote to him, representing the miserable state of Italy under the Lombards, the imminent danger of Rome, and the inaction of the Exarch, and directing him to press the Emperor for succour. He also desired him to send back to Rome the monk Maximianus, who, together with other monks of his monastery, had accompanied Gregory to Constantinople. This, his official residence in the imperial city, could not fail to be of advantage to him in the way of preparation for his subsequent position, as giving him a practical knowledge of the state of parties there, the ways of the court, and the conduct of political affairs. He also made friends of position and influence there, with whom he afterwards corresponded; among whom may be named Theoctista, the Emperor's sister, who had charge of the imperial children, Narses a patrician, Theodorus, physician to the Emperor, Gregoria, lady of the bedchamber to the Empress, and two patrician ladies, Clementina and Rusticiana. All these were religious persons, over whom he had gained influence, which he did not allow to die. He also formed at this time the intimate acquaintance of Leander, Bishop of Seville, who happened to be sojourning in Constantinople, and to whom he wrote afterwards very affectionate letters. It was at his instigation that he began, while at Constantinople, the Magna Moralia, or Exposition of the Book of Job, which he also dedicated to him in its completed form (Moral. Libri., Epist. Missoria, c. 1; Epp., Lib. V. Ep. 49). For he found time from secular business for devotion and study with the monks who had followed him from Rome, including his particular friend Maximianus, as has been already mentioned.