Michael, while resisting all attacks made or favoured by the pope, saw the desirability of being reconciled with him so as, if possible, to induce him not to lend his support to the efforts of Baldwin to recover the city. With this object he never lost an opportunity, even at the cost of alienating the sympathies of his own people and being denounced by his own ecclesiastics, of endeavouring to gain the pontifical favour by attempting to bring about the Union of the Churches.
It is remarkable that from his accession until the end of his reign these attempts fill a part of all contemporary histories quite disproportionate to what at first sight appears their importance. It is even more remarkable that during the whole period between the capture of the city by Michael and the Moslem siege in 1453 the dominant question of interest was that of the Union of the Churches. The fact that the representative of Western Europe was the sovereign pontiff accounts to a great extent, though not altogether, for the prominent part played by the religious question in nearly all the negotiations between the later emperors and the West. Not even the constant and almost unceasing struggle with the Turks occupies so much attention as do the negotiations with Rome, the embassies, the Councils, and the ever-varying tentatives to bring the two Churches into reconciliation. No true conception of the life of the empire can be formed unless it is realised how completely its citizens were occupied with these semi-religious, semi-political questions. On one side the popes were almost constant in their attempts, now to compel the Eastern Church to come in, now to persuade it; on the other, the emperors, while fully cognisant of the importance of diverting Western attacks and, at a later period, of receiving aid against the common enemy of Christendom, had constantly to meet with the dogged and unceasing opposition and bitter hostility of the great mass of their subjects to purchasing help at the price of union with the Latin Church.
A struggle began immediately on the accession of Michael and soon became a curiously complicated strife. The pope in 1262 proclaimed a Crusade against him and against the Genoese, who still remained allied with him. The pontiff characterised Michael as a usurper and a schismatic, and granted the same indulgences to those who took up arms or contributed to the expenses of the expedition against him as to those who fought for the deliverance of the Holy Land. He urged St. Louis to collect tithes for the same purpose.[26] Michael, on the other hand, while preparing to resist invasion and strengthening the city walls, increasing his fleet, and raising new levies, yet sought to satisfy the pope by offering to do his utmost to bring about the Union of the Churches. Possibly owing to the emperor’s representations, Urban the Fourth countermanded the proposed expedition, diverting it against the Tartars who were then invading Palestine. He sent friars to Constantinople to exhort the emperor to carry out his proposal for reunion. His successor, Clement, was, however, a man of a different spirit and replied to the promises of Michael that they were only fair words intended to prevent him from aiding the dethroned Baldwin. While Michael had undoubtedly this object in view, he seems to have been sincere in his desire for Union. One of his objections to the patriarch Arsenius was that he would have nothing to do with the Latins. The Greek priests clamoured to such an extent against the patriarch who succeeded Arsenius, because he was believed to be willing to follow the emperor’s example in working for Union, that he was compelled to resign.
As time went on, the Venetians, whose influence in the city had fallen with the Latin empire, began to lose hope of seeing Baldwin re-established on the throne, and in 1267 sent to make peace with Michael. Gregory the Tenth threatened the doge with anathema if he even made a truce with him. The emperor endeavoured, though in vain, to appease the wrath of the pope by obtaining the intervention of Louis of France. Gregory, whom Michael had congratulated on his accession upon the death of Clement, was more conciliatory. He sent legates to the capital to treat once more on Union. Pachymer gives a vivid account of the negotiations which followed, an account from which it is difficult to doubt the sincerity of the emperor’s wish for reconciliation or the persistence of the opposition which he had to encounter. He states[27] that the emperor followed the example of John Ducas of Nicaea, that he sent many embassies to Rome, and that his real object was to obtain from the popes protection for the Greeks. Gregory assured him that no time was so favourable as the present for putting an end to the Greek schism. The emperor on his side did his utmost to persuade the patriarch and the bishops to aid him. The Latin delegates themselves were men of piety who showed every possible respect for the Greek rite. They were invited to discuss the differences between the dogmas of the two Churches. In their interviews with the bishops they claimed that the Filioque clause which constituted the great point of discussion was a divine mystery which was impenetrable, that while the difference between the Latin formula which declared that the Holy Ghost proceeds from the Father and the Son was not really at variance with the Greek that He proceeded from the Father by the Son, they ought to be content with the reasons which the Latins adduced for inserting it in the Creed. The bishops met these observations with a rugged non possumus. Their Creed was what had been consecrated by the usage of centuries. It was dangerous for any one Church to add to the Symbols even words which were not contrary to the Catholic faith. The bishops openly declared that, whatever the threats of the emperor might be, they would hold to the ancient formula.
News of an expedition to restore the Latin empire came pouring in, and the emperor determined to have his own way and to conciliate the pope. In an assembly in which the patriarch, bishops, and other ecclesiastics took part he spoke at great length in favour of reconciliation. The patriarch appointed Veccus, a man famous for his eloquence and learning, to reply to him. His reply is summed up by Pachymer: ‘There are heretics who are so called. There are some who are not heretics and are not so called. There are some who are called but are not heretics, and lastly there are others who are not called but are heretics, and it is in this latter class that the Latins must be placed.’
The emperor dismissed the assembly and was violently angry against Veccus, whom he accused of having acted with bad faith. Having failed in substantiating a formal charge, he arbitrarily sent him prisoner to the Tower of Anemas. While in prison, however, Michael furnished him with books which favoured the Latin case, and, says Pachymer, as he was a man of singular simplicity and of sincere love for the truth he became disposed towards reconciliation. He was released. The emperor pressed the patriarch and the bishops to find a modus vivendi with the Latins, and was now aided by Veccus, who had discovered that the sole fault of the Western Church was that it had solely upon its own authority added the obnoxious clause to the Creed. The patriarch and the bishops, however, were obdurate. By dint of persecution, by requiring them to pay arrears of rent for their monasteries and houses, he sought to force them to come to an arrangement. He called another assembly and finally succeeded in obtaining a declaration from them with which for the time he was forced to be content. In this very assembly, however, one of the aged bishops besought him not to press the Union, assuring him that even if the dignitaries signed no one else would accept it. The Arsenites and the Josephites, as the followers of the two ex-patriarchs who would not comply with the emperor’s wish were called, had with them the great mass of the citizens, and the aged dignitary was probably right when he stated[28] that if the emperor persisted, civil war would be the consequence.
Meantime the emperor, who could not or would not understand this bitter opposition to his desires, was aware that negotiations were going on between Charles of Anjou, king of Sicily (whose daughter had married the son and heir of Baldwin, the ex-emperor), and the Venetians for an attack upon his territories and the restoration of the Latin empire. Michael sent costly presents to the pope, and once more declared his determination to bring about Union, and asked his indulgence. Once more he sent delegates to the pope, who in return ordered Charles to facilitate their passage through his dominions and to postpone hostilities. The emperor insisted on Union, and in the following year, 1274, he and some of the bishops sent other delegates to Lyons to complete a formal reconciliation. On their arrival in that city they pronounced during the celebration of Mass the obnoxious clause. Gregory the Tenth declared that they had come voluntarily to submit themselves, to make the Roman confession of faith, and to recognise his supremacy. After George Acropolitas had read the emperor’s profession, and the envoy of the bishops theirs, a Te Deum was sung and the Union proclaimed. But whatever the pope or the emperor might wish or even do, the Eastern Church was not prepared to ratify a reconciliation. The patriarch still refused to yield. He had gone as far as he intended to go and declared that he would abdicate if the Union were accomplished. Thereupon he was deposed by the synod. Immediately afterwards the pope’s name was introduced into the public prayers, but with the result that the breach between those in favour of Union and those opposed to it became wider. The emperor pertinaciously persevered, and with his consent Veccus, who had now gone over to the emperor’s side, was named patriarch.
On the return of the delegates from Lyons, preaching friars were sent to Constantinople by Innocent the Fifth. On his death, in 1276, his successor, John the Twenty-fifth, sent nuncios, who were received with great honour, and Michael, in return, together with the patriarch sent delegates to confirm the Union. They arrived, however, in Rome after the death of John. In 1277 Michael and his son Andronicus, the heir to the throne, who was now of full age, formally confirmed the Union of the Churches. Thereupon there began a struggle with those who opposed it. The patriarch Veccus excommunicated its adversaries, mentioning the leaders by name. John the Bastard, the despot of Epirus, who was the foremost, at once called a Council and submitted the question to its decision. This Council anathematised alike the emperor, the pope, and the patriarch. Some of the nobles and officers sent against John openly declared for him as the defender of the ancient faith.
The new pope was convinced that the emperor was doing his utmost to bring about Union, and in consequence refused permission to Charles of Anjou to send an expedition against him. When his nuncios arrived, in 1279, in the capital, they learned that, in spite of the emperor and the patriarch, the clergy and people would not accept Union. The nuncios were taken to the prisons and saw nobles, even of the emperor’s own family, as well as many others, loaded with chains on account of their opposition on this question to the imperial wish. They were convinced of the emperor’s good faith, but no definite statement could be obtained from the bishops. Non possumus remained the expression of their attitude.