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.’