The Byzantine emperor Manuel I Comnenos made approaches to him to negotiate a reunion of the churches. But Michael did not trust the Greeks. He refused to go to Constantinople when invited by the emperor, and even refused twice, in 1170 and 1172, to meet his envoy Theorianus, instead sending as his own representative bishop John of Kaishoum and then his disciple Theodore bar Wahbun. In three successive letters to the emperor, he replied with a simple statement of the miaphysite creed of the Jacobites.