8 But our great joy in the deep veneration which all the Christian peoples of the East have for St. Cyril is mingled with an equal regret that not all of them have come together into that desired unity of which he was the ardent lover and promoter. And especially do We deplore that this should be so at the present time, when it is above all necessary that all Christ's faithful ones should labor together in heart and endeavor for union in the one Church of Jesus Christ, so that they may present a common, serried, united, and unyielding front to the daily growing attacks of the enemies of religion.
Source: Orientalis Ecclesiae (Vatican.va)